- X-ray structure determination at 2.6-A resolution of a lipoate-containing protein: the H-protein of the glycine decarboxylase complex from pea leaves. Pares, S., Cohen-Addad, C., Sieker, L., Neuburger, M., Douce, R. Proc. Natl. Acad. Sci. U.S.A. (1994)