半胱氨酸 bàn guāng ān suān 🔊 cysteine (Cys), an amino acid + Keep this word Meanings bàn guāng ān suān cysteine (Cys), an amino acidmercaptoethyl amine Its characters 半bànhalfHSK 1胱guāngused in 膀胱[pang2 guang1]氨ānammonia酸suānsourHSK 4