Cells that produce this protein are located in abundance in the stratum granulosum and the stratum lucidum.
Cells which are named for this protein can be surrounded by an envelope containing cystatin A and loricrin. IRS cells produce large amounts of trichohyalin and this other protein. Filaggrin helps facilitate aggregation of this protein, whose acidic and basic types form type I and type II (*) intermediate filaments. Cells that produce this protein are located in abundance in the stratum granulosum and the stratum lucidum. Large amounts of this protein are produced in a hardening process known as cornification. In the epidermis this protein makes skin waterproof and contributes to its structural integrity. For 10 points, name this protein found in abundance in hair and fingernails.
Cells which are named for this protein can be surrounded by an envelope containing cystatin A and loricrin.
keratin