Macinnes JW, Uretz RB. DNA organization in the mature sperm of several orthoptera by the method of polarized fluorescence microscopy.
J Cell Biol 1968;
38:426-36. [PMID:
5690994 PMCID:
PMC2107478 DOI:
10.1083/jcb.38.2.426]
[Citation(s) in RCA: 21] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Mature sperm of Acheta domesticus, Acheta assimilis, Nemobius fasciatus, Nemobius confusus, Melanoplus femur-rubrum, Romalea microptera, Scudderia curvicauda, and Ceuthophilus nigricans were examined for DNA configuration by means of polarized fluorescence microscopy. In all cases, the results suggest that the DNA lies in unsupercoiled array, predominantly parallel to the elongate sperm head axes. Detailed calculations of the factors influencing the degree of polarization of the fluorescent emission from supercoiled DNA are contained in an appendix.
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