Multiple choice Which of the following proteins are contained in specific granules of neutrophils? Cathepsin and gelatinase Myeloperoxidase, bactericidal/permeability-increasing proteins (BPI), defensins, serine proteases neutrophil elastase and cathepsin G Alkaline phosphatase, lysozyme, NADPH oxidase, collagenase, lactoferrin and cathelicidin Cytokines such as IL-1, IL-2, IL-4, IL-5, IL-6, IL-8, IL-13 and TNF alpha Reveal answer Fill a bubble to check yourself C Correct answer Explanation Alkaline phosphatase, lysozyme, NADPH oxidase, collagenase, lactoferrin and cathelicidin are contained in the specific granules (or secondary granules) of neutrophils.