ITGA2 and major depressive disorder: This group of genes included Metallothionein 1E (MT1E), Natriuretic Peptide B (NPPB), Leucine Rich Repeat Containing 15 (LRRC15), MHC Class I Polypeptide-Related Sequence B (MICB), Fibronectin Type III Domain Containing 1 (FNDC1), DP Ribosylation Factor Like GTPase 11 (ARL11), Charged Multivesicular Body Protein 4C (CHMP4C), Nerve Growth Factor (NGF), and Integrin Subunit Alpha 2 (ITGA2) many of which have already been implicated in MDD and could be used to identify patient response to bupropion in vitro, prior to drug prescription.