Reports

Proton Magnetic Resonance of Proteins Fully Deuterated except for 1H-Leucine Side Chains

Science  23 Aug 1968:
Vol. 161, Issue 3843, pp. 795-796
DOI: 10.1126/science.161.3843.795

Abstract

The fully deuterated proteins C-phycocyanin, C-phycoerythrin, and cytochrome c have been obtained by biosynthesis with the leucine side chains, and only the leucine side chains, of normal (1H) isotopic composition. In these (isotopic hybrid) proteins, proton magnetic resonance analysis shows that the 1H-leucine side chains are in a variety of environments. During protein biosynthesis, the alpha hydrogen of leucine is exchanged with a hydrogen (2H) from the aqueous medium.

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