div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=february27-2007-vol-104-no9-pp-3017-3668-proceedings-limiteduapapers07pnas10409coverpdfhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: February27 2007 vol 104 no9 pp 3017-3668 Proceedings limiteduAPapers07pnas_104_09_coverpdf · February27 2007 vol 104 no9 pp 3017-3668 Proceedings of the National loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader036vdocumentsmxreader036viewer20220708025f02da497e708231d40654ffhtml5thumbnails1jpg width=140 height=200 divdiv