the results indicate that : ( 1 ) a 65-67k keratin component is limited to the suprabasal layers , ( 2 ) a 58k keratin is present throughout the epidermis , ( 3 ) a 56k keratin appears to be made only in cells above the basal layer , possibly in the upper spinous or granular layer , and ( 4 ) a 50k keratin is present in all living layers but is largely eliminated during stratum corneum formation .
C0014520
epidermis
C0221921
stratum corneum