Undecaprenyl-phosphate 4-deoxy-4-formamido-L-arabinose transferase (EC2.7.8.30, undecaprenyl-phosphate Ara4FN transferase, Ara4FN transferase, polymyxin resistance protein PmrF, UDP-4-amino-4-deoxy-alpha-L-arabinose:ditrans,polycis-undecaprenyl phosphate 4-amino-4-deoxy-alpha-L-arabinosyltransferase) is an enzyme with systematic nameUDP-4-amino-4-deoxy-alpha-L-arabinose:ditrans,octacis-undecaprenyl phosphate 4-amino-4-deoxy-alpha-L-arabinosyltransferase.[1][2] This enzyme catalyses the following chemical reaction