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.
A) The activity of the enzyme indoleamine 2,3-dioxygenase (IDO) was indirectly measured as the ratio between kynurenine and tryptophan. The levels of B) tryptophan and C) kynurenine were measured by liquid chromatography.
