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“The inhibition of corneal collagenase by cysteine was partially reversible by the addition of calcium, indicating that part of its inhibition is due to chelatng.”
“The purified collagenase had a pH optimum of 7 to 8.5 and was inhibited by sera from normal and tumor-bearing rabbits, ethylenediaminetetraacetic acid, and cysteine.”
“This collagenase had a molecular weight of 65,000, an isoelectric point of 7.0, and was inhibited by cysteine , dithiothreitol (DTT), NasEDTA, Ca NasEDTA and freshly prepared rabbit serum.”