1. 
   lyases
   Enzymes of the EC Class 4 (see E classification) that catalyse the non-hydrolytic removal of a group from a substrate with the resulting formation of a double-bond; or the reverse reaction, in which case the enzyme is acting as a synthetase. Include decarboxylases, aldolases and dehydratases.
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
2. 
   lyases
   <enzyme> A class of enzymes that catalyze the cleavage of c-c, c-o, and c-n, and other bonds by other means than by hydrolysis or oxidation. ... Registry number: EC 4. ... (12 Dec 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?lyases
   
   
3. 
   Lyases
   ===Liberal Democrats leadership election, 2006=== (Self-nomination.) This article is now pretty stable, as the election finished a few months ago. It is well-referenced and comprehensive and has undergone a peer review (albeit a fairly quiet one). —Whouk (talk) 20:36, 8 May 2006 (UTC) ...
   Found op http://en.wikipedia.org/wiki/Lyases
   
   
4. 
   lyases
   1) Chemical enzymes
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/lyases/1
   
   

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