PNAS is one of the world’s most-cited and comprehensive multidisciplinary scientific journals, publishing more than 3,500 research papers annually. As the flagship peer-reviewed journal of the National Academy of Sciences (NAS), PNAS serves as an authoritative source of high-impact, original research that spans the biological, physical, and social sciences, with global reach and open submission to researchers worldwide.
Vipers make serum proteins that neutralize their own venom. Combinations of them fully blocked the lethal action of three viper venoms in mice, partly blocked two more, and did nothing at all against the African puff adder.