Methods and compositions for assessing antibody specificities

An array comprising an array surface and at least two peptide probes, wherein each of the at least two peptide probes comprises a binding motif selected from the group consisting of:

• [RK]MRxID (SEQ ID NO:
• 104), QHxGHP (SEQ ID NO:
• 105), KxxLPED (SEQ ID NO:
• 106), [IV]LxxFGY (SEQ ID NO:
• 107, PLDxxxxIS (SEQ ID NO:
• 108), ETXIPXE (SEQ ID NO:
• 109), [VI]Nx[DE][ML]YxP (SEQ ID NO:
• 110), FLxxIGA (SEQ ID NO:
• 111), D[VI]x[MI][ILV]x[KR] (SEQ ID NO:
• 112), RxSPYx[IL]F (SEQ ID NO:
• 113), VGPRH (SEQ ID NO:
• 114), PQxQH[ED] (SEQ ID NO:
• 115), PxxGGFG (SEQ ID NO:
• 116), KxEGxxMG (SEQ ID NO:
• 117), KxxGxTxxLS (SEQ ID NO:
• 118), EMG[FW]Q (SEQ ID NO:
• 119), [VI]KxGxxDxP (SEQ ID NO:
• 120), PE[DN]ExYP (SEQ ID NO:
• 121), HYEWA (SEQ ID NO:
• 122), [HR]SNMxF (SEQ ID NO:
• 123), M[TV]GxxYE (SEQ ID NO:
• 124), Dxx[KH]ExxLL (SEQ ID NO:
• 125), RxxWx[EDA]x[IV][AR] (SEQ ID NO:
• 126, PxDxxAx[GPA][TS] (SEQ ID NO:
• 127), PDxxSxT[ARG] (SEQ ID NO:
• 128), GRExDG (SEQ ID NO:
• 129), GVPGxxxK (SEQ ID NO:
• 130), [LM]xxx[EDQ]VxxIM (SEQ ID NO:
• 131), SxxxVSGG (SEQ ID NO:
• 132), A[KR]AG[DN]K (SEQ ID NO:
• 133, F[RN]xIN[RQ] (SEQ ID NO:
• 134), YXPVXPXSY (SEQ ID NO:
• 135), KxTFPD (SEQ ID NO:
• 136), PFM[FVM]xxR (SEQ ID NO:
• 137), EFWEP (SEQ ID NO:
• 138), [FY]GALS (SEQ ID NO:
• 139), PxGTEN (SEQ ID NO:
• 140), Gx[KE]PWE (SEQ ID NO:
• 141), and D[IV]Tx[YF][WN] (SEQ ID NO:
• 142), and wherein the at least two peptide probes extend from the array surface.