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9.B.221.  The 5 TMS YgjV (YgjV) Family 

The YgjV family of unknown function consists of numerous proteins including the E. col YgjV protein of 5 established TMSs (Drew et al. 2002).

References associated with 9.B.221 family:

Rodionov, D.A., M.S. Gelfand, and N. Hugouvieux-Cotte-Pattat. (2004). Comparative genomics of the KdgR regulon in Erwinia chrysanthemi 3937 and other γ-proteobacteria. Microbiology 150: 3571-3590. 15528647