Disclosed herein is a peptide containing conjugate comprising (P)c-(L)d-(G)e, wherein P is a peptide and each occurance of P is independently selected from Table 2； L is an optional linker and each occurance of L, if present, is independently selected from Table 3； G is a targeting ligand and each occurance of G is independently selected from Table 4； d is 0, 1, 2, 3, 4, 5 or 6； and each of c and e is independently 1, 2, 3, 4, 5 or 6. The conjugate can be administered to a subject either alone or in combination with a composition comprising R-(L)a-(G)b, wherein R is an oligonucleotide as defined herein, to inhibit expression of a gene of the subject.
