these changes in expression of m42 ag paralleled a structural change : the mr of the antigen decreased from a 195,000/210,000 doublet in caput sperm to a 185,000/200,000 doublet in corpus and cauda sperm , as determined by immunoblot analysis of sodium dodecyl sulfate ( sds ) -extracted sperm .
C0037844
caput sperm
C0037868
sperm