1. Lamporte, D. A., Advances in Botanical Research (edit. by Preston, R. D.), 2, 151 (Academic Press, 1965).
2. Steward, F. C., and Pollard, J. K., Nature, 182, 828 (1958).
3. Steward, F. C., Pollard, J. K., Patchett, A. A., and Witkop, B., Biochim. Biophys. Acta., 28, 308 (1958).
4. Pollard, J. K., and Steward, F. C., J. Exp. Bot., 10, 17 (1959).
5. Nickerson, W. J., and Falcone, G., in Sulphur in Proteins (edit. by Benesch, R. E.), 404 (Academic Press, 1959).