Title: Nature vol 90-n2261.indd Creator: Adobe InDesign 2.0 Producer: Adobe PDF Library 5.0 CreationDate: Tue Jul 11 09:07:37 2006 ModDate: Tue Aug 29 09:58:11 2006 Tagged: no Form: none Pages: 1 Encrypted: no Page size: 538.583 x 751.181 pts (rotated 0 degrees) File size: 110045 bytes Optimized: no PDF version: 1.4