what does the second base contain in amino acid Tryptophan (Trp)

Answer 1

The second base in the amino acid Tryptophan (Trp) is the indole ring. The indole ring is an aromatic compound consisting of a six-membered benzene ring fused to a five-membered nitrogen-containing ring. It is responsible for the unique properties and functions of Tryptophan in various biological processes.