Nitrogen is an essential constituent of all

The functional groups present in Asparagine,a nonessential amino acid,are

The general formula of an $\alpha$-amino acid is shown below. Identify the side chain $-R$ for the amino acid serine.

Assertion : At isoelectric point,the amino acid does not migrate under the influence of an electric field.
Reason : At isoelectric point,amino acid exists as a zwitterion.

Thyroxine produced in the thyroid is an iodinated derivative of . . . . . . amino acid.

Which of the following is capable of forming a zwitter ion?