An official website of the United States government
Here's how you know
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.
Cartoon representations of the five major species21 in the ecDHFR catalytic cycle on the left side and the superimposed crystal structures22 of the modeled Michaelis-Menten complex (light purple; PDB 7DFR) and the initial product complex (bronze; PDB 1RC4) on the right side.