[Term] id: PR:000061871 name: hemoglobin subunit beta, initiator methionine removed carboxylated and protonated 1 (human) def: "A hemoglobin subunit beta (human) that has had the initiator methionine removed, that has been carboxylated on the residue at the position equivalent to Val-2 of the amino acid sequence represented by UniProtKB:P68871, and that includes at least 1 protonated residue. UniProtKB:P68871, 2-147, Val-2, MOD:01874|MOD:01699." [PRO:DNx, Reactome:R-HSA-1237013] comment: Category=organism-modification. synonym: "hHBB/InitMet-/Cbxprot:1" EXACT PRO-short-label [PRO:DNx] synonym: "CO-H+-HBB" RELATED Reactome-displayName [PRO:DNx, Reactome:R-HSA-1237013] synonym: "UniProtKB:P68871, 2-147, Val-2, MOD:01874|MOD:01699" EXACT PRO-proteoform-std [PRO:DNx] xref: Reactome:R-HSA-1237013 "PR:000061871 located_in GO:0005829" is_a: PR:P68871 ! hemoglobin subunit beta (human) relationship: has_part MOD:01874 ! N-carboxy-L-valine relationship: has_part MOD:01699 ! protonated residue relationship: only_in_taxon NCBITaxon:9606 ! Homo sapiens