Therefore,it is important to control strictly reaction conditions for removing cystine's mesoisomer and making L-cystine of high optical purity.
严格控制反件,分离除去内消旋氨酸是制取高光L-氨酸的重要措施。
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A tiny minority of stones are cystine stones, composed of the amino acid cystine which sometimes leaks into the urine to crystalize and form a yellow or light pink colored stone that is radiopaque under X-ray.
有一小部分氨酸,氨酸渗入尿晶形成黄色或者淡粉色的,在X线下不透光的。
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