<p> Members of this protein family are ABC transporter ATP-binding subunits, part of a three-gene putative bacteriocin transport operon. The other subunits include another ATP-binding subunit (<db_xref db="TIGRFAMS" dbkey="TIGR03796"/>), which has an N-terminal propeptide cleavage domain, and an HlyD homologue (<db_xref db="TIGRFAMS" dbkey="TIGR03794"/>). In a number of genomes, a conserved propeptide sequence with a classic Gly-Gly motif </p>