3.1.3.48	protein-tyrosine-phosphatase	SCC-4 cell	a head and neck squamous cell carcinoma cell line	707975	
3.4.14.4	dipeptidyl-peptidase III	SCC-4 cell	concurrent expression of mRNA variants DPP III V-I and V-II	754680	
3.4.22.1	cathepsin B	SCC-4 cell	a tongue cancer cell line	710254