501
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Lin MS, Zhang A, Wilson MG, Fujimoto A. DA/DAPI-fluorescent heteromorphism of human Y chromosome. Hum Genet 1988; 79:36-8. [PMID: 3366461 DOI: 10.1007/bf00291706] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Variation of DA/DAPI intensity in the Yq12 band was observed in five amniotic cell specimens and one blood specimen from the father of one fetus. Three distinct classes of Yq heterochromatin were identified by distamycin A (DA) treatment of the cell cultures and various staining techniques. The heterochromatin in the Yq11.23 sub-band does not undercondense when exposed to DA, and shows pale fluorescence with quinacrine staining, positive C-banding, and bright fluorescence with DA/DAPI technique. This class of heterochromatin was consistently observed in all specimens studied. The other two classes of heterochromatin are in the Yq12 band. Both show undercondensation when exposed to DA, quinacrine-bright fluorescence, and positive C-banding; however, one class of heterochromatin shows DA/DAPI-bright fluorescence and the other shows pale fluorescence. The size and banding intensity of the two classes of heterochromatin in Yq12 are variable. These results provide cytological evidence of heterogeneity within the Y heterochromatin region containing AT-rich DNA.
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502
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Zhang A, Lu P, Yang N, Wu Z. Thermal Analysis of PE Extended Chain Crystal of PE Extended Chain Crystal from Gel Spinning. INT POLYM PROC 1987. [DOI: 10.3139/217.870072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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503
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Abstract
Chronic lymphocytic leukemia (CLL) is a very common form of leukemia among middle-aged and elderly persons in Western countries. In the Japanese, or in those with Japanese ancestry born and living in the USA, CLL is rather rare. It is also rare in China, but convincing data to support this statement are found primarily in the Chinese literature. We have reviewed previously unpublished data from Peking Union Medical College (PUMC) concerning the frequency of CLL among adult patients with the four common types of leukemia. Of 4,174 such patients (1952-1986), 4.6% had CLL; 22.9% chronic myeloid leukemia (CML); 50.3% acute myeloid leukemia (AML); and 22.3% acute lymphoblastic leukemia (ALL). This low frequency of CLL is none the less higher than that found in a multiinstitutional collection of Chinese patients with leukemia. Various clinical and laboratory aspects of a carefully studied, previously published group of patients with CLL from PUMC were compared to similar published findings in patients from the University of Utah. No differences in the overall nature of the disease were detected between these groups. However, not unexpectedly, the duration of symptoms before the diagnosis was made longer in Chinese than in USA patients and the proportion diagnosed at a time when no CLL related symptoms had been noted was less in Chinese. Neither differences in life span in the two populations nor an excess of CML, AML, and ALL at the expense of CLL were viable hypotheses to explain the rarity of CLL in China. We suggest that the dearth of CLL in Chinese is on a genetic basis, as it is thought to be in the Japanese.
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504
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Zhang A, Lin MS, Wilson MG. Effect of C-banded heterochromatin on centromere separation. Hum Hered 1987; 37:285-9. [PMID: 3666759 DOI: 10.1159/000153719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
The present study is to determine the effects of centromeric heterochromatin on centromere separation. Amniotic cell cultures in which the centromeric heterochromatin of one chromosome was at least twice as large (qh+) as the heterochromatin (qh) in the homologous chromosome were selected. Fifteen amniotic cell samples with 1qh+, 9qh+ or 16qh+ were studied. The size of the centromeric heterochromatin was directly correlated with the delay in centromere separation. The chromosome with the smaller centromeric heterochromatin tended to show earlier centromere separation than the homologue with the larger heterochromatin. Our results suggest that the quantity of centromeric heterochromatin may influence the genetic control of centromere separation.
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505
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Zhang A, Ge XQ. The serum and red cell folate levels in pregnant women in Beijing. Chin Med J (Engl) 1986; 99:899-902. [PMID: 3107928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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506
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Zhu DX, Zhang A, Zhu NC, Xu LX, Deutsch HF, Han KK. Investigations of primary and secondary structure of porcine ubiquitin. Its N epsilon-acetylated lysine derivative. THE INTERNATIONAL JOURNAL OF BIOCHEMISTRY 1986; 18:473-6. [PMID: 3011536 DOI: 10.1016/0020-711x(86)90191-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
N epsilon-acetylation in vitro of internal lysyl residues of Ub by p-nitro-phenyl acetate at pH 8.0 was performed. The position of acetylation sites are determined. (e.g. Fully acetylated: Lys-6, Lys-11 and Lys-33; partially free internal lysines: Lys-27, Lys-29; Lys-48 and probably Lys-63.) 55 cycles Edman degradation were performed and the first 53 N-terminal residues were identified. Secondary structural studies of ubiquitin have been carried out using the circular dichroism (CD) technique. No changes are noted upon heating to 100 degrees C at neutral pH even in the presence of 8 M urea but in 6 M guanidine-HCl extensive modification results. Ubiquitin with an average of 4.4 of its 7 lysines in the N epsilon-acetyl form shows little deviation from native protein. After reduction with dithiothreitol and subsequent removal of the mercaptan, significant changes in the secondary structure are noted. Circular dichroic measurements of ubiquitin indicated an alpha-helical content of about 10% whereas the secondary structural predictions of Chou and Fasman suggest a level of about 45%.
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507
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Hou YH, Li XR, Li DG, Zhang A. Sister chromatid exchange and cell cycle in peripheral lymphocytes in patients with acute leukemia. Chin Med J (Engl) 1985; 98:598-602. [PMID: 3937688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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508
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Pan HZ, Feng LM, Li CH, Zhang ZN, Huang WX, Zhang A. [Effect of sialic acid on hemolysis of the paroxysmal nocturnal hemoglobinuria (PNH) erythrocytes]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1985; 7:221-3. [PMID: 2939977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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509
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Pan HZ, Fen LM, Liu XB, Chen X, Zhang ZN, Huang WX, Zhang A. [Lipid peroxidation of paroxysmal nocturnal hemoglobinuria (PNH) erythrocyte membrane]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1985; 7:126-9. [PMID: 2936498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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510
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Hou YH, Li XR, Shen T, Zhang A. [Studies on SCE frequencies in peripheral blood lymphocytes with a HOAP regimen]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1984; 6:436-8. [PMID: 6242548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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511
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Wu QA, Zhang A. Ultrastructural studies on mitochondria. Diagnosis of acute leukemia. Chin Med J (Engl) 1984; 97:509-14. [PMID: 6441687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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512
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Yang QE, Zhang A. [Application of bis-diketopiperazine in the treatment of acute leukemia and other malignant blood disorders]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1984; 6:17-20. [PMID: 6238688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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513
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Pan HZ, Feng LM, Yang QZ, Zhang ZN, Huang WX, Zhang A. [Effect of aluminum on hemolysis of paroxysmal nocturnal hemoglobinuria erythrocytes]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1984; 6:65-7. [PMID: 6238703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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514
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Yang QE, Zhang A. [Experimental study on antileukemic sera. II. The effect of leukemic autoplasma on antiserum cytotoxic reactions]. ZHONGHUA YI XUE ZA ZHI 1983; 63:87-9. [PMID: 6407736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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515
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Zhang A, Huang WX. [Recognition of multiple myeloma]. ZHONGHUA NEI KE ZA ZHI 1982; 21:513-5. [PMID: 7151560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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516
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Wu Q, Zhang A. Ribosome-lamella complexes in a lymphoid-plasma cell of Waldenström's macroglobulinemia. Chin Med J (Engl) 1982; 95:625-7. [PMID: 6814866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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517
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Zhang Y, Luo S, Tan F, Qi Z, Xu L, Zhang A. Complete amino acid sequence of mung bean trypsin inhibitor. SCIENTIA SINICA. SERIES B, CHEMICAL, BIOLOGICAL, AGRICULTURAL, MEDICAL & EARTH SCIENCES 1982; 25:268-77. [PMID: 6125033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The mung bean trypsin inhibitor has been found to be microheterogeneous at N-terminal region due to the presence of several isomers. After treatment with aminopeptidase M it becomes homogeneous and is suitable for sequence determination. Based on the determination of the structures of two active fragments the complete amino acid sequence of mung bean trypsin inhibitor has been elucidated. It consists of 72 amino acid residues with 7 pairs of disulfide bonds. The results show that this inhibitor belongs to the Bowman-Birk inhibitor family.
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518
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Zhang A, Zhang ZN, Liu TH, Liu EK, Li DG, Zheng TL. [Malignant histiocytosis - analysis of 30 cases (author's transl)]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1981; 3:167-70. [PMID: 6459176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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519
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Zhang ZN, Pan HZ, Huang WX, Zhou FL, Feng LM, Li CH, Fang ZY, Xiong F, Hong T, Zhang A. Observations on red cell membrane of paroxysmal nocturnal hemoglobinuria. Chin Med J (Engl) 1981; 94:207-12. [PMID: 6790235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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520
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Zhang A. [Clinical analysis of 414 cases of chronic granulocytic leukemia (author's transl)]. ZHONGHUA NEI KE ZA ZHI 1981; 20:194-7. [PMID: 6946900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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521
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Pasternak GW, Zhang A, Tecott L. Developmental differences between high and low affinity opiate binding sites: their relationship to analgesia and respiratory depression. Life Sci 1980; 27:1185-90. [PMID: 6252404 DOI: 10.1016/0024-3205(80)90470-1] [Citation(s) in RCA: 131] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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522
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Zhang A. [Clinical analysis of 15 cases of primary thrombocytosis (author's transl)]. ZHONGHUA NEI KE ZA ZHI 1980; 19:327-9. [PMID: 7227064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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523
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Zhang A, Huang WX, Jiang YL, Wu AR, He XM, Nie LC. [IgD multiple myeloma (with 2 cases showing diffuse sclerotic bone lesions) (author's transl)]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1979; 1:101-6. [PMID: 262821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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524
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Zhang ZN, Huang WX, Zhang A, Pan HZ, Zhou FL, Feng LM. [The modified cobra venom factor hemolysis test and its clinical application (author's transl)]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1979; 1:57-61. [PMID: 262812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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