Quoting Wikipedia: "Some enzymes operate with kinetics which are faster than diffusion rates, which would seem to be impossible." Which are those enzymes and how can they be so fast?

One example is catalase which Lionel Milgrom discusses in Water Journal no. 7.

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    $\begingroup$ Is this a homework question? $\endgroup$
    – Remi.b
    Commented Sep 1, 2016 at 22:46
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    $\begingroup$ No. I ask since some surfing didn't give any answer. $\endgroup$ Commented Sep 2, 2016 at 0:06
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    $\begingroup$ Diffusion rates of what? Please provide some explanation in your question. As it is now, the question is unclear. $\endgroup$
    Commented Sep 2, 2016 at 8:33
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    $\begingroup$ @WYSIWYG I presume he's referring to diffusion-controlled reactions and diffusion limited enzymes. It's a rather standard concept in enzyme kinetics. $\endgroup$
    – R.M.
    Commented Sep 2, 2016 at 15:42
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    $\begingroup$ @David Here is one such claim: "One of these enzymes, superoxide dismutase, actually catalyzes reactions FASTER than the diffusion-controlled rate. That's because the active site is surrounded by charged residues that attract oppositely charged substrate molecules!" $\endgroup$
    – R.M.
    Commented Sep 2, 2016 at 15:46


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