domain_id,description,domain_type,proteins
IPR000730,"Proliferating cell nuclear antigen, PCNA",Family,PCNA
IPR022648,"Proliferating cell nuclear antigen, PCNA, N-terminal",Domain,PCNA
IPR022649,"Proliferating cell nuclear antigen, PCNA, C-terminal",Domain,PCNA
IPR022659,"Proliferating cell nuclear antigen, PCNA, conserved site",Conserved_site,PCNA