 It is three base-pairs different from "M. marinum" in the 5' region of "rpo"B and identical to "M. marinum" in the 3' region of "rpo"B.2) KT1 is positive for both "M. ulcerans"-specific Insertion Sequences, IS2404 and IS2606.3) KT1 is identical to the "M. marinum" heat shock protein 65 ("hsp"65) and 3 base-pairs different from "M. ulcerans".