Table of Contents
International Journal of Peptides
Volume 2013, Article ID 629549, 6 pages
Research Article

Sequence Determination of a Novel Tripeptide Isolated from the Young Leaves of Azadirachta indica A. Juss

Department of Biochemistry, PSG College of Arts & Science, Civil Aerodrome Post, Coimbatore, Tamil Nadu 641014, India

Received 10 October 2012; Revised 16 December 2012; Accepted 12 January 2013

Academic Editor: Tzi Bun Ng

Copyright © 2013 M. Rajeswari Prabha and B. Ramachandramurty. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The neem tree has long been recognized for its unique properties, both against insects and in improving human health. Every part of the tree has been used as a traditional medicine for household remedy against various human ailments, from antiquity. Although the occurrence of various phytochemicals in neem has been studied, we have identified the presence of a novel tripeptide in the young leaves of neem using a simple and inexpensive paper chromatographic method, detected by Cu(II)-ninhydrin reagent. The peptide nature of the isolated compound is confirmed by spectral studies. The sequence of the peptide is determined using de novo sequencing by tandem MS after purification.