Organization of the V. vulnificus YJ016 super-integron. The integrase gene, intIA, is shown as a yellow arrow and the neighboring primary integration site (attI) as a purple square next to the intIA. The 188 attC sites are indicated by red triangles. The 202 ORFs are indicated by arrows, with two NTP pyrophosphohydrolase (mutT) genes and four PAS genes in green and blue, respectively.