[Term] id: PR:000039073 name: upstream stimulatory factor 1 isoform 1 def: "An upstream stimulatory factor 1 that is a translation product of some mRNA whose exon structure and start site selection renders it capable of giving rise to a protein with the amino acid sequence represented by UniProtKB:P22415-1 or a 1:1 ortholog thereof." [PRO:DNx] comment: Category=sequence. synonym: "USF1/iso:1" EXACT PRO-short-label [PRO:DNx] property_value: has_archetype PR:P22415-1 is_a: PR:000017137 ! upstream stimulatory factor 1