div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=directed-selective-pressure-on-a-lactamase-to-analyse-molecular-changeshtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: Directed selective pressure on a β-lactamase to analyse molecular changes involved in development of enzyme function loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader031vdocumentsnetreader031viewer2022020523575068571a28ab0f07afb76ehtml5thumbnails1jpg width=140 height=200 divp© Nature Publishing Group1976pdivdiv class=ts-pagebutton class=gotoPage data-page=2Page 2button div class=ts-imageimg data-url=directed-selective-pressure-on-a-lactamase-to-analyse-molecular-changeshtmlpage=2 data-page=2 class=ts-thumb lazyload alt=Page 2: Directed selective pressure on a β-lactamase to analyse molecular changes involved in development of enzyme function loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader031vdocumentsnetreader031viewer2022020523575068571a28ab0f07afb76ehtml5thumbnails2jpg width=140 height=200 divp© Nature Publishing Group1976pdiv