Relationships in streptococci between growth and metabolism of glutamine

b; mg./ml.) of different batches of the p1resent organisms gave values for b/a of 0-368, 0-345, 0.377, 0-390 and 0-353 (mean: 0-367). The slopes of the initial portions of the lines of Fig. Eight other standard curves have given values differing from this by less than 25%. SUMMARY 1. A number of substances structurally related to glutamic acid has been prepared, including the hydrazide, R. CO. NH. NH2; its acetone derivative, R. CO . NH . N:C(CH3)2; its benzaldehyde derivative, R . CO .NH . N:CH . CBH5; the hydroxamic acid, R . CO . NHOH; and an analogous sulphoxide, R . SO. CH3 and sulphone, R