Electron Spin-Echo Envelope Modulation Studies Of 14N In Biological Systems

Abstract

Electron Spin-Echo Envelope Modulation Spectroscopy has provided great insight into the structure and function of many important biomolecules. Since its first application, this pulsed resonance technique has been found to be especially sensitive to those systems containing weak nuclear couplings. This chapter highlights representative Electron Spin-Echo Envelope Modulation investigations into protein systems containing paramagnetic transition ions and free radicals where geometric and electronic information was obtained through the detection and analysis of weak 14N coupling interactions.