Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

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.

View full-text article in PMC

. 2012 Jul 1;17(1):119–140. doi: 10.1089/ars.2012.4612

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Copyright 2012, Mary Ann Liebert, Inc.

PMC Copyright notice

FIG. 4. — Hydrogen atom donation to carbon-centered radicals. Simple species containing an SH group such as H₂S, HS-, HS-SH, and HSS- excel at undoing the damage inflicted to biomolecules by free radicals through hydrogen atom donation to carbon-centered radicals (157, 191). Although hydrogen atom transfer to carbon-centered radicals is a diffusion-controlled reaction, the extremely low concentrations of H₂S and H₂Sx in blood and tissues limit their efficiency at repairing free radical damage to biomolecules.