Amino‐acid composition of lucerne and of lucerne and grass protein preparations

The ammo-acid composition of lucerne herbage cut at six stages of maturity has been determined by an ion-exchange chromatographic procedure and compared with that of protein preparations isolated from lucerne and grasses. The protein preparations from grass and lucerne were of closely similar amino-acid composition; no appreciable difference in composition could be detected between protein preparations from young or mature lucerne. The amino-acid composition of lucerne-herbage N differed from that of the protein preparations; this difference arose because these herbages contained about 30% of their nitrogen in a water-soluble form, only part of which was present as free amino-acids. The amino-acid composition of lucerne herbage changed little as maturity increased.

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