Fig. 1From: Single-nucleotide polymorphisms and activities of indoleamine 2,3-dioxygenase isoforms, IDO1 and IDO2, in tuberculosis patientsSanger sequence electropherograms of R248W and Y359X and the position of R248W and Y359X in the predicted 3D structure. (a) Three IDO2 genotypes were found in R248W and Y359X: wild type, heterocigoto type, and homocigoto type; (b) Mutations in the predicted 3D structure of IDO2 (red arrows). Structure prediction using the SWISS-MODEL server showed that IDO1 and IDO2 formed dimers. Interaction values of binding free energy (− 12.75 kcal/mol) and dissociation constant (4.50 e− 10 M) were estimated using the PPA-Pred2 online software (Protein-Protein Affinity Predictor; https://www.iitm.ac.in/bioinfo/PPA_Pred/prediction.html)Back to article page