TABLE 1.

Primers used in this study

Gene target	Primer orientation	Sequence	Amplicon size (bp)	Reference
Human IDO1	Forward	5′-AGAAGTGGGCTTTGCTCTGC-3′	230	59
	Reverse	5′-TGGCAAGACCTTACGGACATCTC-3′
Human β-actin	Forward	5′-CATGTACGTTGCTATCCAGGC-3′	250	60
	Reverse	5′-CTCCTTAATGTCACGCACGAT-3′
trpR	Forward	5′-GATGGCTGGAATGCGTTTGT-3′	176	This study
	Reverse	5′-CTCACACCATATGCCTCAG-3′
trpB	Forward	5′-AGACAGGAGCAGGACAAC-3′	198	This study
	Reverse	5′-GGAGAGCCTCATTTACGG-3′
16S rRNA	Forward	5′-AGTCGAACGGAATAATGGCT-3′	204	62
	Reverse	5′-CCAACAAGCTGATATCCCAC-3′