Abstract
CREST sera have been used to identify kinetochores in mature mammalian sperm heads. It is necessary to decondense the sperm heads artificially to permit access of the reagents before the kinetochores can be demonstrated immunocytochemically. The distribution of kinetochores in the sperm heads appears to be random. These results show that the kinetochore antigen recognized by the CREST sera used here is retained during spermiogenesis and is passed on to the zygote at fertilization.
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