1. Allen, J. C., and Humphries, C. (1975)FEBS Lett. 57, 158?162.
2. Bertaut, E. P., Duc, T. Q., Burlet, P., Thomas, M., and Moreau, J. M. (1974)Acta Crystallogr. B 30, 2234?2236.
3. Blunden, G., and Gordon, S. M. (1986)Prog. Phycol. Res. 4, 39?80.
4. Chen, X.-M., and Mak, T. C. W. (1990a)J. Mol. Struct.,221.
5. Chen, X.-M. and Mak, T. C. W. (1990b)J. Mol. Struct., in press.