Cleavage initiating activities of sperm fractions injected into the egg of the medaka, Oryzias latipes.
D000818:Animals; D002025:Bufonidae; D002499:Centrifugation, Density Gradient; D005260:Female; D005306:Fertilization; D005399:Fishes; D005407:Flagella; D002479:Inclusion Bodies; D008297:Male; D008845:Microinjections; D008854:Microscopy, Electron; D008870:Microtubules; D008928:Mitochondria; D008938:Mitosis; D010063:Ovum / Q000166:cytology* / Q000254:growth & development; D051381:Rats; D013094:Spermatozoa / Q000032:analysis*