PR:P18510-3 interleukin-1 receptor antagonist protein isoform 3 (human) hIL1RN/iso:3|interleukin-1 receptor antagonist protein isoform icIL-1ra type II (human) located_in GO:0005622 intracellular anatomical structure PMID:7629520 IDA NCBITaxon:9606 UniProtKB:P18510-3 20080922 PRO:CNA