Arnab completed his PhD in 2006-07 from CSIR-Indian Institute of Chemical Biology in the field of human genetics under the supervision of Prof. Kunal Ray. Subsequently, he moved to US for his postdoctoral training with Profs. Svetlana Lutsenko and Ann Hubbard at The Johns Hopkins University. His field of study was to elucidate the regulations of the human copper pumps and channels. After a brief stint at the University of Calcutta as a Ramanujan Fellow, he set up his independent research group at IISER Kolkata. Presently at IISER Kolkata, using various cutting edge techniques especially high-resolution imaging and molecular dynamic studies, his group is probing the secretory pathway that the copper ATPase ATP7A and ATP7B traverses to export copper from the cell. The second line of the group's interest is to understand the copper mediated endocytic regulation of the primary copper importer CTR1. The research of the group is funded through multiple funding agencies, i.e., The Wellcome Trust DBT India Alliance, DST-Early Career Research Award, Intramural funding from IISER Kolkata.