NPC2, a seminal plasma protein with membrane cholesterol-binding ability, influences the cryotolerance and functionality of spermatozoa from Chino Santandereano bulls.

Despite Latin America's rich biodiversity, active genetic material conservation programs are scarce. This study investigates potential freezability markers in both sperm and seminal plasma (SP) in Chino Santandereano, a Colombian Creole breed. Thirty ejaculates from ten Chino Santandereano bulls were cryopreserved and subsequently classified as of good (GFE) or poor (PFE) freezability according to their post-thaw total sperm motility (TMOT) and plasma membrane integrity (PMI).