Protein making up the bulk of keratohyaline granules in stratum granulosum of keratinized epithelium is______________? August 2, 2021July 15, 2019 by admin Protein making up the bulk of keratohyaline granules in stratum granulosum of keratinized epithelium is______________? A. Involucrin B. VinculinC. Filaggrin D. Nectin