NRP1 and infection: Rv1997 or cation transporting P-type ATPase F (ctpF) is one such gene, which in addition to the regular cues of dormancy (Park et al., 2003; Voskuil et al., 2003; Kumar et al., 2008), is also upregulated in early infection, non-replicating persistence-1 (NRP-1) and NRP-2 states (Muttucumaru et al., 2004).