
1) Amino acid 2) Aminoalkanoic acid 3) Discovered in bladder stones 4) Organic disulfide
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https://www.crosswordclues.com/clue/cystine

1) Dicysteine
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https://www.crosswordclues.com/clue/cystine

dicysteine. Compare with cysteine. A naturally occuring amino acid with a disulfide bridge group on its side chain, formed by condensation of two cysteine residues.
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http://antoine.frostburg.edu/chem/senese/101/glossary/c.shtml

Cystine is the amino acid formed by the oxidation of two cysteine molecules that covalently link via a disulfide bond. This organosulfur compound has the formula (SCH2CH(NH2)CO2H)2. It is a white solid that is slightly soluble in water. Human hair and skin contain approximately 10-14% cystine by mass. It was discovered in 1810 by William Hyde Woll...
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http://en.wikipedia.org/wiki/Cystine

• (n.) A white crystalline substance, C3H7NSO2, containing sulphur, occuring as a constituent of certain rare urinary calculi, and occasionally found as a sediment in urine.
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http://thinkexist.com/dictionary/meaning/cystine/

a crystalline, sulfur-containing amino acid that is formed from two molecules of the amino acid cysteine. Cystine can be converted to cysteine by ... [7 related articles]
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http://www.britannica.com/eb/a-z/c/176

<amino acid> The amino acid formed by linking two cysteine residues with a disulphide linkage between the two SH groups. The analagous compound present within proteins is termed two half cysteines. ... (18 Nov 1997) ...
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http://www.encyclo.co.uk/local/20973

(sis´tēn) (sis´tin) a naturally occurring amino acid, the chief sulfur-containing component of the protein molecule. It is sometimes found in the urine and in the kidneys in the form of tiny crystals that can form cystine calculi in the bladder.
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http://www.encyclo.co.uk/local/21001

The amino acid formed by linking two cysteine residues with a disulphide linkage between the two sulphydryl (SH) groups. The analogous compound present within proteins is termed two half cysteines.
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http://www.encyclo.co.uk/visitor-contributions.php
Cyst'ine noun [ See
Cyst .]
(Physiol. Chem.) A white crystalline substance, C
3 H
7 NSO
2 , containing sulphur, occuring as a constituent of certain rare urinary calculi, and occasionally found as a sediment in urine.
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http://www.encyclo.co.uk/webster/C/212

Type: Term Pronunciation: sis′tēn, sis′tin Definitions: 1. the disulfide product of two cysteines in which two —SH groups become one —S—S— group; if two cysteinyl residues in polypeptide chains form a disulfide linkage, then the two polymers are cross-linked; sometimes occurs as a deposit in the urine, or forming a vesical ...
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http://www.medilexicon.com/medicaldictionary.php?t=22520

Cystine: An amino acid that is particularly notable because it is the least soluble of all of the naturally occurring amino acids and because it precipitates out of solution in the genetic disease cystinuria to form stones in the urinary tract. Cystine is the chief sulfur-containing compound in protein. Cystine is generated by the union of two cyst...
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http://www.medterms.com/script/main/art.asp?articlekey=7733

Cystine is a white crystalline base containing sulphur. It occurs as a constituent of certain rare urinary calculi, and is occasionally found as a sediment in urine, and in most proteins especially the keratins in hair, wool and horn.
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http://www.probertencyclopaedia.com/browse/GC.HTM

[
n] - a crystalline amino acid found in proteins (especially keratin)
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http://www.webdictionary.co.uk/definition.php?query=cystine
noun a crystalline amino acid found in proteins (especially keratin); discovered in bladder stones
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https://www.encyclo.co.uk/local/20974

a crystalline amino acid, CHONS, occurring in most proteins, esp. the keratins in hair, wool, and horn, and yielding cysteine on reduction.
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https://www.infoplease.com/dictionary/cystine
No exact match found.