Feasibility study for the measurement of a large set of triplet phases from a small protein.

The feasibility of measuring a set of triplet phases large enough to solve the structure of a small protein has been evaluated. A total of about 850 triplet phases have been measured from the tetragonal form of hen egg-white lysozyme. From these triplet phases, about 750 single phases can be derived. The experimental details of these measurements as well as the results, the values of the measured triplet phases, are reported. Additional experimental data from other small proteins are also presented.