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Changes in ADAM-1 properties in bi-dimensional blots. Sperm protein extracted from 4 different epididymal regions, proximal caput (Z2), distal caput (Z4), corpus (Z6) and distal cauda (Z9), were separated by isoelectric focusing on 8-16% SDS-PAGE and then transferred to nitrocellulose. The western blots were probed with the anti-ADAM-1 C-terminal polyclonal antibody. Several different ADAM-1 isoforms can be distinguished along the epididymis.
