Removes a sterol from a membrane or a monolayer lipid particle, transports it through the aqueous phase while protected in a hydrophobic pocket, and brings it to an acceptor membrane or lipid particle. [ http://www.ncbi.nlm.nih.gov/pubmed/20823909 GOC:krc http://www.ncbi.nlm.nih.gov/pubmed/25797198 http://www.ncbi.nlm.nih.gov/pubmed/24220498 ]
Synonyms: sterol carrier activity