No matter the source of tryptophan, the biosynthesis begins with the decarboxylation of L-tryptophan (step 1).    From Wordnik.com.  [Enterprising chemistry majors at Georgetown] Reference

No matter the source of tryptophan, the biosynthesis begins with the decarboxylation of.    From Wordnik.com.  [Redskins Insider Podcast -- The Washington Post] Reference

= (6S) - hydroxyhyoscyamine + succi - nate + CO2 Reaction type decarboxylation epoxidation hydroxylation 82.    From Wordnik.com.  [Recently Uploaded Slideshows] Reference

O + CO2 (a flavopro - tein, FAD) Reaction type oxidation oxidative decarboxylation redox reaction reduction 200.    From Wordnik.com.  [Recently Uploaded Slideshows] Reference

+ NAD (P) H + H+ + O2 + 2 H2 O = catechol + CO2 + NAD (P) + + NH3 (requires Fe2+) Reaction type deamination decarboxylation oxidation 123.    From Wordnik.com.  [Recently Uploaded Slideshows] Reference

As I see it, the conversion can be presented as three chemical reactions: hydrolysis, decarboxylation, and product degradation (for lack of a better term).    From Wordnik.com.  [R-Squared Energy Blog] Reference

Vervoort, J.; Rietjens, I.M.C.M.: Catabolism of 4-hydroxybenzoate in Candida parapsilosis pro - ceeds through initial oxidative decarboxylation by a FAD-dependent 4-hy - droxybenzoate.    From Wordnik.com.  [Recently Uploaded Slideshows] Reference

Droxidopa is a synthetic catecholamine that is directly converted to norepinephrine NE via decarboxylation, resulting in increased levels of NE in the nervous system, both centrally and peripherally.    From Wordnik.com.  [Chelsea Therapeutics Accelerates Northera NDA Filing Following Meeting With FDA - Yahoo! Finance] Reference

Droxidopa is a synthetic catecholamine that is directly converted to norepinephrine (NE) via decarboxylation, resulting in increased levels of NE in the nervous system, both centrally and peripherally.    From Wordnik.com.  [News] Reference