Fig. 2.
Kynurenine pathway. IDO, indoleamine-pyrrole 2,3-dioxygenase; TDO, tryptophan 2,3‐dioxygenase; 3-HAA, 3-hydroxyanthranilic acid; NAD, nicotine adenine dinucleotide.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.