标题：The C-Group Pachytene Bivalent with a Locus Characteristic for Parachromosomally Situated Particulate Bodies (Parameres): A Provisional Map in Human Males
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1972
卷号：69
期号：8
页码：2165-2168
DOI：10.1073/pnas.69.8.2165
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：During prophase stages of the first meiotic division in human males, an autosomal divalent in the C group (autosomes 6-12) characteristically has associated with it, at a specific locus, small, DNA-containing bodies (parameres). A pachytene chromomere map is presented, as is evidence suggesting that the parameres are disposed in two lateral loops, each of which is coaxial with one of the homologs. Stereophotographs of stacks of plates from electron micrographs of serial ultrathin sections show the parameres in their in situ configuration to be composed of tightly compacted fibrils, 85-90 A in diameter.
