Com protein (zein) is low in Lysine and tryptophan. Why is it an inadequate prot

Question

Com protein (zein) is low in Lysine and tryptophan. Why is it an inadequate protein? Suppose that a protein were composed entirely of glycine, alanine, leucine, and valine. Draw the structure of a segment of this protein, using all of the amino acid residues. Would this protein be an effective buffer? Explain. This experiment did not include the isolation of a pure amino add from the hydrolysis product of a protein such as bouillon. Why would the isolation of a pure amino add be extremely difficult?

Explanation / Answer

7. Proteins which lack essential amino acids are classified as inadequate proteins. Tryptophan and lysine are essential amino acids. Presence of essential /indispensable amino acids in the diet is necessary for maintaining proper growth and other physiological activities.

There is no growth in the absence of lysine and tryptophan. Hence, corn protein ein lacking these essential amino acids is an inadequate protein.

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