[Term] id: PR:000026589 name: tyrosine-protein kinase BTK isoform 1, initiator methionine removed form def: "A tyrosine-protein kinase BTK isoform 1 that has had the initiator methionine removed." [PRO:DNx] comment: Category=modification. synonym: "BTK/iso:1/InitMet-" EXACT PRO-short-label [PRO:DNx] intersection_of: PR:000002236 ! tyrosine-protein kinase BTK isoform 1 intersection_of: lacks_part PR:000021937 ! initiator methionine