Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A proteolytic enzyme regulated by the concentration of calcium ions.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun biochemistry Any of a family of enzymes that regulate calcium in the body

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Probably cal(cium) + p(rote)a(se) + –in.]

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