cytokeratin a ( no . 8 ) is a cytoskeletal protein ( mr , approximately 53,000 in bovine cells ) which is typical of all simple epithelia , is widespread in all cultured epithelial cells , and together with its partner cytokeratin d , is the first cytokeratin expressed during embryogenesis ( synonyms for this protein are endo a and troma-1 antigen ) .
C0010852
cytoskeletal protein
C0033684
protein