Helical conformation of dense fibres from mammalian spermatozoa.
D000818:Animals; D006224:Cricetinae; D005407:Flagella / Q000648:ultrastructure; D008297:Male; D011817:Rabbits; D051381:Rats; D013010:Sonication; D013082:Sperm Tail / Q000648:ultrastructure; D013094:Spermatozoa / Q000648:ultrastructure*