Date: 25 Nov 2003 11:33:05 -0000 From: Subbiah Gunasekaran <gunasekaran_subbiah@rediffmail.com> Dear Members: I will be grateful if anyone could kindly send me the following reference in PDF. Nature Biotechnology, Volume 21, 01 Octber 2003, Page 1151-1152 Thanks S. Gunasekaran Library & Inf. Services CECRI Karaikudi 630 006 India.