Fig. 5. AT and PT are not efficiently processed.
a Primary amino acid sequences of loops linking C and T domains in DT, AT, and PT. b Structures of processing sites in DT, AT, and PT in gray, green, and purple, respectively. c SDS-PAGE analysis of holotoxin processing by Vero cell lysate. d Dose titration of DT and DT activation loop chimeras DT(ATF), DT(PTF) on Vero cells (mean ± SD, n = 2); n = 3 biological replicates. e Time course of protein synthesis inhibition in Vero cells treated with 10 nM of DT, DT(ATF), and DT(PTF) (mean ± SD, n = 2); n = 3 biological replicates. f Dose titration of DT and DT (uncleavable) on Vero cells (mean ± SD, n = 4); n = 3 biological replicates.
