Cysteine is produced by enzymatic or acid hydrolysis of proteins. 시스테인은 시스틴 시스틴으로 산화될 수 있는데, 시스틴 시스틴은 물에 잘 녹지 않습니다. Sometimes it can be found in the urine and in the bladder in a crystal form where it will form cystine calculus stones in the kidneys or bladder.