Cholesteryl esters are bound by a peptide-initiation and a peptide-elongation factor

Significantly higher quantities of cholesteryl 14-methylhexadecanoate than of cholesteryl laurate and cholesteryl palmitate are bound by a homogeneous peptide-initiation factor and purified peptide-elongation factor 1. Cholesteryl 14-methylhexadecanoate may function as a specific allosteric modifier changing the conformation of protein synthesis factors and thus modulating the activity of their binding sites.