M. Okabe et al., CHARACTERIZATION OF CAPACITATION INHIBITORY PROTEIN FROM RABBIT SEMINAL PLASMA - HOMOLOGY WITH HUMAN ANNEXINS, Biological & pharmaceutical bulletin, 16(5), 1993, pp. 453-456
A protein was purified from rabbit seminal plasma using preparative ac
rylamide disc electrophoresis, ammonium sulfate precipitation and gel
filtration. The protein inhibited the in vitro fertilization of mouse
ova inseminated with epididymal sperm and with capacitated sperm. The
inhibition was not observed, however, when only ova were exposed to th
e protein prior to mixing with sperm. The partial protein sequence ana
lysis revealed the strong homology of the rabbit fertilization inhibit
ory protein to human annexin V.