Preferred Label : MysB protein, mycobacterium smegmatis; 
MeSH note : The sigma factor is an initiation factor that promotes attachment of the RNA polymerase
               to specific initiation sites and then is released; similar to sigma(70) proteins;
               isolated from Mycobacterium smegmatis; amino acid sequence in first source; GenBank
               U09863; 
Is substance : O; 
         
         
            Origin ID : C093499; 
UMLS CUI : C0297379; 
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