Patent ID: 8105603

Claim:
An isolated polypeptide that binds APRIL comprising the following sequence: C-S-Q-N-E-Y-F-D-S-L X 11 -H-A-C-X 15 -P-C-X 18 -L-X 20 -C-S-S-N-T-P-P-L-T-C-Q-R-Y-C (SEQ ID NO: 34) wherein X 11 is L, I, or V; wherein X 15 is I, A, or K; wherein X 18 is Q or D; and wherein X 20 is R or Y and wherein the sequence does not comprise the sequence (SEQ ID NO: 35) CSQNEYFDSLLHACIPCQLRCSSNTPPLTCQRYC.