From comparison of the eyes of lampreys and jawed vertebrates, it is clear that a 'vertebrate-style' camera eye was already present in the last common ancestor of these taxa, around 500 million years ...

Pyruvate formate-lyase (PFL) from Escherichia coli uses a radical mechanism to reversibly cleave the C1-C2 bond of pyruvate using the Gly 734 radical and two cysteine residues (Cys 418, Cys 419). We ...