transfection of a plasmid , psvk18 , containing a mouse keratin 18 cdna regulated by the sv40 early region promoter , was used to force the synthesis of exogenous ( but homologous ) type i keratin and to assess the effect of the oversynthesis of a keratin on endogenous keratins and vimentin intermediate filaments ( ifs ) .
C1179970
type i keratin
C0010803
keratins