[Term] id: PR:000025790 name: T-cell-specific surface glycoprotein CD28 isoform 1, signal peptide removed phosphorylated 1 (human) def: "A T-cell-specific surface glycoprotein CD28 isoform 1, signal peptide removed phosphorylated 1 in human. UniProtKB:P10747-1, 19-220, Tyr-191, MOD:00048." [PRO:CNA, PMID:8992971] comment: Category=organism-modification. synonym: "hCD28/iso:1/SigPep-/Phos:1" EXACT PRO-short-label [PRO:DNx] synonym: "PRO_0000014652, Tyr-191, MOD:00048" EXACT PRO-proteoform-ftid [PRO:DNx] synonym: "UniProtKB:P10747-1, 19-220, Tyr-191, MOD:00048" EXACT PRO-proteoform-std [PRO:DNx] xref: Reactome:R-HSA-388756 "PR:000025790 located_in GO:0005886" intersection_of: PR:000025789 ! T-cell-specific surface glycoprotein CD28 isoform 1, signal peptide removed phosphorylated 1 intersection_of: only_in_taxon NCBITaxon:9606 ! Homo sapiens relationship: has_part MOD:00048 ! O4'-phospho-L-tyrosine