Many proteins interact with PCNA via the two known PCNA -interacting motifs PCNA-interacting peptide ( PIP ) box and AlkB homologue 2 PCNA interacting motif ( APIM ) .
ADJ NOUN VERB ADP PROPN ADP DET NUM VERB PROPN -interacting VERB NOUN NOUN ( PROPN ) NOUN CCONJ ADV NOUN NUM PROPN VERB NOUN ( PROPN ) .