Definition of Cystine:

A nonessential amino acid but may be essential for individuals with certain diseases or nutritional concerns.  Cystine is a structural component of tissues and hormones.  Interconvertible with L-Cysteine.

Topics Related to Cystine

Kidney Stones (Urolithiasis)

...the condition
“...Other types of stones are the struvite stone (caused by infection), uric acid stone and cystine stone.  In the U.S. it is estimated that 13% of men and 7% of women will develop a kidney stone during their lifetime...”

Sulfur Requirement

...the condition
“...Most of the body's sulfur is found in the sulfur-containing amino acids methionine, cystine, and cysteine...”

Urinalysis a treatment
“...Very uncommon crystals include: cystine crystals in urine of neonates with congenital cystinuria or severe liver disease, tyrosine crystals with congenital tyrosinosis or marked liver impairment, or leucine crystals in patients with...”
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