eng Oriental Scientific Publishing Company Biomedical and Pharmacology Journal 0974-6242 2015-04-26 5 2 363 366 2549 article N. Packialakshmi Jamal Mohamed College (Autonomous) Trichirappalli - 620 020, India. The amino acid profile of earthworms from Tamilnadu namely Perionyx excavatus were evaluated in this study. The amino acid analysis was conducted using Thin layer chromatography (TLC) .Two essential aminoacids namely Phenylalanine and Tyrosine two non-essential amino acids namely lycine and Proline were identified. Melanin gives colour to our skin , the enzyme tyrosinase is the responsible for the melanin formation. In this study found the aminoacid tyrosine. https://biomedpharmajournal.org/vol5no2/enzyme-activity-of-earthworm-coelomic-fluid-in-leukoderma-peoples/ Essential Non essential amino acids Perionyx excavatus