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factor H



  1. former designation for biotin;
  2. vitamin B12 analogue or precursor;
  3. a glycoprotein that regulates the activity of complement factor C3b; a deficiency results in the lack of inhibition of the alternative hemolytic pathway leading to continuous activation and consumption of factor C3 (hemolytic uremic syndrome).

Further information

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.