[Term] id: PR:000071178 name: complement C4-A phosphorylated 1 (human) def: "A complement C4-A (human) that has been phosphorylated on the residue at the position equivalent to Ser-668 of the amino acid sequence represented by UniProtKB:P0C0L4-1. Example: UniProtKB:P0C0L4-1, Ser-668, MOD:00046." [PRO:DNx, IEDB_epitope:2146097] comment: Category=organism-modification. synonym: "hC4A/Phos:1" EXACT PRO-short-label [PRO:DNx] synonym: "UniProtKB:P0C0L4, Ser-668, MOD:00046" EXACT PRO-proteoform-std [PRO:DNx] synonym: "UniProtKB:P0C0L4-1, Ser-668, MOD:00046" NARROW PRO-proteoform-std [PRO:DNx] is_a: PR:P0C0L4 ! complement C4-A (human) relationship: has_part MOD:00046 ! O-phospho-L-serine relationship: only_in_taxon NCBITaxon:9606 ! Homo sapiens