beginDocumentation()
doc ///
    Key
    	twoSiteModificationF
	1:(twoSiteModificationF)
    Headline
    	an example for chemical reaction motif
    Description
      Text
        A two-site phosphorylation system where phosphorylation is catalyzed by the same kniase at both sites but dephosphorylation is catalyzed by different phosphateases. It assumes sequential (de)phosphorylation.
      Example
        twoSiteModificationF()
      Text
        To rename species, use @TO (substitute, ReactionNetwork, List) @.		
    ///