“…2 As to the mechanism of the binding of non-cationic chromium complexes by collagen, evidence for the function of groups other than the carboxyl in this reaction has been presented. 3 However, it has been postulated that the carboxyl group is instrumental for the fixation of chromium compounds generally, irrespective of their electrochemical state. 4 It has earlier been demonstrated" that by com-(1) For a general survey, see .…”