The identity of each group A Tlp receptor for all seven known group A tlp genes, tlp1-4, 7, 10 and 11 in each of the 33 C. jejuni strains were determined by PCR amplification (Table 1). The C. jejuni strains tested appeared to ARS-1620 clinical trial possess varied sets of group A Tlp receptor genes, with six strains (C. jejuni 520, GCH3, 6, 10, 14 and 17) possessing all seven group A tlp genes (Table 1). Tlp1 was see more present in all strains tested and is the only universally conserved tlp gene within the strains (Table 1). Tlp7 was present in 31 of 33 strains,

while, tlp10 and tlp3 were detected in 30 of 33 strains making them the next most conserved of the tlp genes (Table 1). The least representatively conserved tlp genes, other than tlp11, were tlp2 and tlp4

(Table 1). Table 1 Results of PCR amplification of tlp genes of C. jejuni strains isolated from both chickens and humans C. jejuni strain Tlp1 Tlp2 Tlp3 Tlp4 Tlp7 Tlp10 Tlp11 Chicken isolates 008 + – + + + P + – 019 + – + – + P + – 108 + – + + + P + – 331 + + – + + W + – 434 + – + + + W + – 506 + – + + + W – - 913 + + + – + W – - Human isolates Laboratory maintained 173 + – + + + W + – 11168-GS + + + + + P + – 11168-O + + + + + P + – 351 + + + – + W + – 430 + + + + + W + – 435 + + + + + W + – 440 + + + + + W + – 520 + + + + + W + + 705 + + + – + W + – 8 + – + + + W + – 81116 + Selleckchem JNK-IN-8 + + + + W + – 81–176 + + – + + W + – 93 + + + + + W – - Human isolates Fresh clinical isolates GCH1 + + + + + P + – GCH2 + + + + + P + – GCH3 + + + + + W + + GCH4 + – + + + W + + GCH5 + + + + + W + – GCH6 + + + + + W + + GCH7 + + + – - + + GCH9 + + + + + P + – GCH10 + + + + + W + + GCH11 + – - – + W + + GCH14 + + + + + W + + GCH15 + + + – - + + GCH17 + + + + + W + + + = Positive PCR product present in repeat experiments. - = No product detected in repeat PCR amplifications. +P refers to the presence of tlp7 as two separately co-expressed genes. +W refers to a whole gene able to be translated into a complete protein product. Sequencing was performed in triplicate to ensure accuracy

of the results. Sequencing results of tlp7 Tlp7 is annoted as a “pseudogene” in C. jejuni 11168 though a recent study showed it is functional in strains that do not possess an uninterrupted tlp7 reading frame [8]. Another SPTLC1 study also showed that the presence of the interrupted reading frame is over or underrepresented in strains isolated from different sources [10]. Due to this we sequenced each tlp7 amplicon to determine if the gene was present as a full length reading frame or if it was split into two open reading frames with the introduction of a stop codon. The PCR primers used to amplify tlp7 were designed to amplify across the split between Cj0951c/Cj0952c of C. jejuni 11168. Sequencing data showed in 23 of the 31 strains that contain tlp7 that it is present as an uninterrupted gene sequence (Table 1).