You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is The amino acid which on decarboxylation gives rise to a product with potent vasodilator propeies is: and explain in detail?
Histamine is derived from the decarboxylation of the aminoacid histidine, a reaction catalyzed by the enzyme L-histidine decarboxylase present in the liver. It is a hydrophilic vasoactive amine. Ref: Neuroscience in Medicine edited by P. Michael Conn, Page 496