[Term] id: PR:000021899 name: bone morphogenetic protein 4 isoform 1, signal peptide removed form def: "A bone morphogenetic protein 4 isoform 1 that has had the signal peptide removed." [PRO:DNx] comment: Category=modification. synonym: "BMP4/iso:1/SigPep-" EXACT PRO-short-label [PRO:DNx] intersection_of: PR:000000386 ! bone morphogenetic protein 4 isoform 1 intersection_of: lacks_part SO:0000418 ! signal_peptide