On Sunday of Week No. 2, 3 gms. of DL-methionine were administered at 1:00 p.m. and 8:00 p.m.2. Thereafter, 3 gms. of methionine were administered at 9:00 a.m., 1:00 p.m. and 8:00 p.m., daily during Weeks No. 2 and No. 3, up to and including 9:00 a.m. on Mon- day of Week No. 4.3. Daily fasting bloods were obtained Monday through Friday for D-and L-methionine during Weeks No. 2 and No. 3. 4. Three-day quantitative urine specimens were ob- tained for methionine assay throughout this period.
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Kinsell et al. (1949) studied this question.