Selenocysteine.
D003545:Cysteine / Q000031:analogs & derivatives* / Q000138:chemical synthesis; D007202:Indicators and Reagents; D009682:Magnetic Resonance Spectroscopy; D012643:Selenium / Q000138:chemical synthesis*; D017279:Selenocysteine; D013055:Spectrophotometry, Infrared
D007202:Indicators and Reagents; D017279:Selenocysteine; D012643:Selenium; D003545:Cysteine