<prompt> Acute phase reactants are all except -C-reactive proteinHaptaglobulinEndothelinFibrinogen  <response>: Ans. is c i.e., Endothelin Acute phase protejns reactantso Acute phase reactants are a class of proteins whose plasma concentration increases or decreases in response to inflammation.o This response is called the acute phase reaction acute phase responseo It should be noted that acute phase proteins not only increase in response to inflammation ; some decrease also1. Proteins which increase in response to inflammation - Positive acute phase proteins2. Proteins which decrease in response to inflammation - Negative acute phase proteins1. Positive acute phase proteins C-reactive protein Pj-globulin a-2 microglobulin a-1 antitrypsin Mannose binding protein Fibrinogen, prothrombin, vWF D-dimer protein Ferritin Haptoglobulin Serum amyloid A Ceruloplasmin Plasminogen, Factor VIII Complement factors 2. Negative acute phase proteins Albumin Prealbumin Transcortin Transferrin Retinol binding protein Transthyretin 