TPSG1 and infection: Additionally, there is coordinated up-regulation of BP1026B_II1561, BP1026B_II0370, BP1026B_II1815 (trpA), and BP1026B_II1817 (trpB) as Bp protrudes towards neighboring cells, suggesting that components of both the shikimate and tryptophan biosynthetic pathways are important during intracellular infection (Figures 1A, 7B) (Heacock-Kang et al., 2021).