EntityQ21208025· pop 16· linked from 479 articlesprogrammed cell death 1Sign in to savemammalian protein found in Homo sapiensConnectionsQ180686EntityT-lymphocytesEntityautoimmune diseaseEntityB-cellEntitycancer immunotherapyEntityEnsembl genome database projectEntitycheckpoint inhibitorEntityCD1EntityPDCD1LG2EntitycancerEntityproteinEntityWikidataEntitygeneEntityimmunityEntitychromosomeEntityamino acidEntityHIVEntitypublic domainEntitydigital object identifierEntityNobel Prize in Physiology or MedicineEntityCategoriesClusters of differentiationGenes on human chromosome 2Immune system