title: 28 s and 18 s ribonucleic acid from mammalian spermatozoa.
abstract: The majority of RNA is spermatozoa from the epididymis and ductus deferens of mice was found to be 28 s and 18 s RNA. This RNA was also seen in human ejaculated spermatozoa. Our evidence indicates that little or none of the 28 s and 18 s RNA is transcribed in the maturing mouse spermatozoa and that the majority is synthesized in the primary spermatocyte. This RNA may be necessary to maintain post-meiotic translation during spermatogenesis.
mesh_terms: D000818:Animals; D008297:Male; D051379:Mice; D008970:Molecular Weight; D012313:RNA / Q000096:biosynthesis / Q000302:isolation & purification*; D013091:Spermatogenesis; D013094:Spermatozoa / Q000032:analysis* / Q000378:metabolism
chemical_list: D012313:RNA