protein_protein_contact PIP_box 2011-06-17T12:33:25Z A polypeptide region that mediates binding to PCNA. The consensus sequence is QXX(hh)XX(aa), where (h) denotes residues with moderately hydrophobic side chains and (a) denotes residues with highly hydrophobic aromatic side chains. SO:0001810 PIP box kareneilbeck sequence