Mercaptoalcylamino acids are generally susceptible to inactivation by oxidation in vivo and decomposition in process of manufacturing themselves or their preparations or with {HEAD ~ the elapse} of {TAIL ~ time} because of the compounds having chemically and biologically active sulfhydryl group 
of
Mercaptoalcylamino acids are generally susceptible to inactivation by oxidation in vivo and decomposition in process of manufacturing themselves or their preparations or with { HEAD ~ the elapse } of { TAIL ~ time } because of the compounds having chemically and biologically active sulfhydryl group
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