Studies of Maleic Hydrazide Interactions with Thiol Compounds.

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Abstract
The observation that thiols will form addition compounds with maleic acid was confirmed. However, maleic hydrazide, which is structurally related to maleic acid, does not react with thiol groups under similar conditions. Studies using radish leaf tissue homogenate indicate that under the conditions studied there is no evidence of an enzyme system in these tissues capable of catalyzing the reaction of thiol radical with maleic hydrazide or converting the maleic hydrazide into a compound that would add to the thiol group.