Biotinyl Cap-Liposome is Liposome with the Biotinyl Cap group. Biotinylated liposomes can be conjugated noncovalently with (strept)avidin through either direct interaction with the protein/antibody conjugated to (strept)avidin or by coupling with other biotinylated proteins using (strept)avidin as a bridging molecule. Both avidin and (strept)avidin form strong noncovalent bond with biotin.