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Description
No, they cant

Cystine was first described in 1810 by Wollaston who found it in a urinary calculus (a bladder stone) he named it cystic oxide but didnt know what it was
Francy, C

Sharer JE, Shipley LA, Vandenbranden MR, Binkley SN, Wrighton SA

PN is particularly prevalent in those with prediabetes, a global health concern projected to impact approximately 548.4 million adults aged 2079 years by 2045 [7]