Table 2. hnRNPs Contain Putative Poly(ADP-ribose)-Binding Motifs^a.

hnRNPs	functions	putative PAR-binding site
hnRNP A1	splicing, mRNA transport, telomere biogenesis	99-GAHLTVKKIF-108
hnRNP A2/B1	splicing, mRNA trafficking	106-GAHVTVKKLF-115
hnRNP C1/C2	transcript packaging, splicing, mRNA stability	92-RGKAGVKRSA-101
hnRNP G	splicing	118-GTRGPPSRGG-127
hnRNP H	splicing	210-YDRPGAGRGY-219
hnRNP K	transcription, stability, translation	261-FDRMPPGRGG-270
hnRNP E1	stability, translation	25-VGSIIGKKGE-34
hnRNP A3	mRNA trafficking, telomere biogenesis	not known
hnRNP L	mRNA export, stability, riboswitch	not known
hnRNP M	splicing	212-DYKVGWKKLK-221
hnRNP U	nuclear retention	not known

^aProteomic analyses have found that heterogeneous nuclear ribonucleoproteins (hnRNPs) contain putative PAR-binding motifs.^135,211