T4SS_CagC is a family of putative pathogenicity island, type IV, conjugal DNA-protein transfer, secretory system proteins from Gram-negative bacteria.

1: Comparative analysis of the complete cag pathogenicity island sequence in four Helicobacter pylori isolates. Blomstergren A, Lundin A, Nilsson C, Engstrand L, Lundeberg J; Gene. 2004;328:85-93. PMID:15019987

2: Microevolution of Helicobacter pylori type IV secretion systems in an ulcer disease patient over a ten-year period. Alvi A, Devi SM, Ahmed I, Hussain MA, Rizwan M, Lamouliatte H, Megraud F, Ahmed N; J Clin Microbiol. 2007;45:4039-4043. PMID:17942650