previously , we demonstrated that surface radiolabeling of rat epididymal spermatozoa by lactoperoxidase-catalyzed iodination reveals a major component with an apparent molecular weight of 26,000 to 28,000 daltons ( 26 kda ) on spermatozoa from the cauda but not the caput epididymidis .
C0014533
epididymal
C0228023
caput epididymidis