“…X15-166B T can switch between flagellum-mediated swimming and pili-mediated twitching. Unlike in the genome of Marinobacter aquaeolei VT8 (a heterotypic synonym for Marinobacter hydrocarbonoclasticus SP17) (13, 14), in which 18 proteins were predicted to be involved in the siderophore subsystem, no such biosynthesis subsystem was identified in the genome of X15-166B T . However, siderophore-dependent iron acquisition ABC transporters, including FhuB, FhuC, and FhuX, and the siderophore-independent ferric uptake system, FbpABC (15), were predicted in X15-166B T by BLASTP ( E < 1e −10 ), suggesting that X15-166B T may have lost the siderophore biosynthesis pathway and be a “cheater” that takes up others’ siderophores (16).…”