div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=the-sequence-is-not-enoughhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: The sequence is not enough loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader030vdocumentssitereader030viewer2022020223575068571a28ab0f07afb8fahtml5thumbnails1jpg width=140 height=200 divp© Nature Publishing Group1977pdivdiv class=ts-pagebutton class=gotoPage data-page=2Page 2button div class=ts-imageimg data-url=the-sequence-is-not-enoughhtmlpage=2 data-page=2 class=ts-thumb lazyload alt=Page 2: The sequence is not enough loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader030vdocumentssitereader030viewer2022020223575068571a28ab0f07afb8fahtml5thumbnails2jpg width=140 height=200 divp© Nature Publishing Group1977pdiv