General Structure Information 3rrq PDCD1 crystal structure of the extracellular domain of human pd-1 2.1Å AUTH E.LAZAR-MOLNAR,U.A.RAMAGOPAL,S.G.NATHENSON,S.C.ALMOTITL CRYSTAL STRUCTURE OF THE EXTRACELLULAR DOMAIN OF HUMAN PD-1REF TO BE PUBLISHEDREFN Variant Set Distributions Mapped Variants