The correct statements regarding alpha - amino acids are

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valine is an essential amino acid.

the isoelectric point of glycine is 6.1

All the $α$ -amino acids which constitute proteins have D-configuration

in $α$ -amino acids, the acidic group is- $\overset{+}{N} H$ , While the basic group is -COO^-

answer is A, B, C.

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Detailed Solution

All naturally occurring proteins from all living organisms consist of L amino acids. The absolute stereochemistry is related to L-glyceraldehyde, as was the case for triacylglycerides and phospholipids. Most naturally occurring chiral amino acids are S, with the exception of cysteine

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