GDP/GTP binding site

SRP-R is composed of two proteins of - 640 and - 300 kDa, the larger of which contains the GDP/GTP binding site and is anchored to the ER membrane by a hydrophobic sequence near its N-tex-minus. 

Peter, M. E., Wittmann-Liebold, B., and Sprinzl, M. (1988) Affinity labeling of the GDP/ GTP-binding site in Thermus thermophilus elongation factor Tu. Biochemistry 27, 9132-9139. 

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