ALTHOUGH the role of pyridoxal phosphate as a coenzyme of amino-acid decarboxylases is generally recognized, attempts to demonstrate its participation in the enzymic decarboxylation of histidine ...

Currently, Dr. Coreen Johnson is taking this research further to discover: Which of the hdc gene products are necessary for the conversion of external histidine to histamine; Where do the hdc proteins ...

The enzyme that does this work is called histidine decarboxylase and can keep working even after the bacteria that produced it have been killed. Species of fish that are thought to be lower in ...

Figure 1: Interactions in the active site of AAD. It is disappointing that Westheimer's simple but elegant explanation for the decreased pK a of Lys115 is now recognized as incorrect. However ...