Patent ID: 8299031

Claim:
A method for promoting entry of a retrovirus, a retrovirus particle, a retrovirus vector, or a retrovirus-based vaccine into a cell, comprising providing to the cell: (i) an isolated peptide having an amino acid sequence of: R1-KEKSRLQGGVLVNEILNHMKRATQIPSYKK-R2 (SEQ ID NO:19); wherein R1 is H, YGIHKQ (SEQ ID NO:20), GIHKQ (SEQ ID NO:21), IHKQ (SEQ ID NO:22), HKQ, KQ, or Q; wherein R2 is COOH, LIMY (SEQ ID NO:23), LIM, LI, or L; wherein the isolated peptide is not the peptide of SEQ ID NO:18; and (ii) a retrovirus, a retrovirus particle, a retrovirus vector, or a retrovirus-based vaccine.