neopterin

[nē-ŏptər-ĭn]

n.

A pteridine present in body fluids, elevated levels of which result from immune system activation, malignant disease, allograft rejection, and viral infections, especially in AIDS.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.