1. 
   Cystathionine
   Cystathionine is an intermediate in the synthesis of cysteine. It is generated from homocysteine and serine by cystathionine beta synthase. It is cleaved into cysteine and α-ketobutyrate by cystathionine gamma-lyase. An excess in the urine is called cystathioninuria. ...
   Found op http://en.wikipedia.org/wiki/Cystathionine
   
   
2. 
   cystathionine
   <chemical> Chemical name: L-Homocysteine, S-(2-amino-2-carboxyethyl)-, (R)- ... (12 Dec 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?cystathionine
   
   
3. 
   cystathionine
   (sis″tә-thi´o-nēn) a thioester of homocysteine and serine; it serves as an intermediate in the transfer of a sulfur atom from methionine to cysteine.
   Found op http://www.encyclo.co.uk/local/21001
   
   
4. 
   cystathionine
   Type: Term Pronunciation: sis′tă-thī′ō-nēn Definitions: 1. The l-isomer is an intermediate in the conversion of l-methionine to l-cysteine; cleaved by cystathionases.
   Found op http://www.medilexicon.com/medicaldictionary.php?t=22492
   
   

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