DL Tryptophan has a role as a Daphnia magna metabolite. It is an alpha-amino acid, an aminoalky lindole, apolar amino acid and an aromatic amino acid. It is a conjugate base of a tryptophanium. It is a conjugate acid of a tryptophanate. DL-Tryptophan has been used as a medium supplement in Psilocybeatobrunnea and Psilocy be serbica for the synthesis of psychotropic compounds. DL-Tryptophan binding to bovine serum albumin is employed for its affinity based chromatographic purification..