Genetics of somatic mammalian cells. II. Chromosomal constitution of cells in tissue culture

Chromosome Complements of Two Species of Primates: Cynopithecus niger and Presbytis entellus

Forty-two chromosomes were counted from expanded cultured cells of four Celebes apes, Cynopithecus niger. Mitotic cells from three Indian langurs, Presbytis entellus, contained 44 chromosomes. These counts support cytogenetically the taxonomical classification of these animals according to Simpson.

Killing of Cultured Rabbit Fibroblasts with Isoimmune Serum

A strain of cultured fibroblasts from a Flemish rabbit, when repeatedly injected into New Zealand rabbits, appears to induce the formation of antibodies. Incubation of the donor fibroblasts with these antiserums results in a significant reduction in the number of cells that survive and multiply.

The satellited chromosomes of man with reference to the marfan syndrome

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Observations on the technique for the study of human chromosomes by the culture of leukocytes from peripheral blood

A critical analysis of the various features of blood leukocyte culture for the study of human chromosomes was carried out. The following observations were made: (1) Fasting blood was essential for effective separation of leukocytes. (2) These cells are easily obtained by differential centrifugation and RBC sedimentation. (3) Non-specific agglutination of leukocytes was prevented by the use of Eagle's medium for suspension cultures. (4) No contamination occurred in a series of 50 leukocyte cultures to which antibiotics were not added. (5) Addition of an experimental Phaseolus vulgaris extract at concentration of 1 x 10(-4) to cultures resulted in a 12 to 15% mitotic index. (6) Desacetyl-methyl-colchicine (Colcemid) had optimal effect at concentration of 0.1 mug./ml. (7) Distilled water added to cell suspension in culture medium (5: 1) was an effective hypotonic agent.A simplified technique of leukocyte culture for chromosome preparations is proposed.

Enlarged satellites as a familial chromosome marker

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Established eurythermic line of fish cells in vitro

An established line of fish cells has been propagated in vitro for 21 months and 48 subcultivations. Important characteristics of the cells are described.

The D triisomy syndrome and XO gonadal dysgenesis in two sisters

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Maintenance of Normal in situ Chromosomal Features in Long-Term Tissue Cultures

Clonal isolates from a rapidly proliferating fibroblast-like derivative have retained the classic diploid chromosome relationship over a period of many transplant generations. The readily identified members of the 11 pairs of chromosomes, including the sex chromosomes (X(1) and X(2)), have aided in localizing minute structural alterations within recloned diploid and aneuploid sublines.

A human skin culture technique used for cytological examinations

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Human chromosome complements in normal somatic cells in culture

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