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.
Residual BH4-dependent PAH activity after exposure of phenylalanine-preincubated enzyme to increasing doses of radiation. The data shown are the averages + SD from four independent experiments. The dashed line shows response obtained by irradiation of unactivated purified PAH (14).
