<prompt> Primary granules in neutrophlis contain all except __.MyeloperoxidaseDefensinAcid hydrolasesLactoferrin  <response>: Neutrophils have two main types of granules The smaller specific or secondary granules contain lysozyme, collagenase, gelatinase, lactoferrin, plasminogen activator, histaminase, and alkaline phosphatase. The larger azurophil or primary granules contain myeloperoxidase, bactericidal factors such as defensins, acid hydrolases, and a variety of neutral proteases elastase, cathepsin G, non-specific collagenases, proteinase.Reference-Robbins BASIC PATHOLOGY 10th edition pg-68 