3nwi is a 5 chain structure with sequence from Salmonella enterica. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
↑Worlock AJ, Smith RL. ZntB is a novel Zn2+ transporter in Salmonella enterica serovar Typhimurium. J Bacteriol. 2002 Aug;184(16):4369-73. PMID:12142406