1. 
   Ia antigen
   Antigens coded for by the I-region of the MHC complex. The majority of, if not all, such antigens are Class II molecules composed of a and b polypeptide chains.
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
2. 
   Ia antigen
   Antigens coded for by the I region of the MHC complex. The majority, if not all, such antigens are Class II molecules composed of _ and _ polypeptide chains. ... (18 Nov 1997) ...
   Found op http://www.mondofacto.com/facts/dictionary?Ia+antigen
   
   

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