the activity of n-acetyl-beta-d-glucosaminidase ( nag , 60.1 units/mg protein ) and of acid phosphatase ( 57.7 units/mg protein ) in fluid from the cauda epididymidis formed without any contribution from the testis ( fluid obtained from a perfused and isolated cauda epididymidis or from an epididymis whose corresponding efferent ducts had been ligated for 40 days ) was significantly higher than the activity of these enzymes in normal fluid ( 39.6 and 41.2 units/mg protein , respectively ) .
C0228024
cauda epididymidis
C0014533
epididymis