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.
Mechanism of NAM information degradation by hydrolysis. a, Simulated model of a single-stranded DNA molecule in an aqueous environment. b, Illustrated mechanisms of depurination (red crosses in place of DNA bases), backbone cleavage (red cross in the DNA backbone), and point mutations resulting from deoxycytidine deamination (red crosses next to DNA bases).
