#Which came first? An experiment in reconstructing primordial proteins solves a long-standing riddle
“#Which came first? An experiment in reconstructing primordial proteins solves a long-standing riddle” The characteristic (HhH)2 fold and its binding to the minor groove of a modern DNA molecule. How did the first ones form? Credit: Weizmann Institute of Science What did the very first proteins look like—those that appeared on Earth around 3.7 billion…