an elisa assay using a monoclonal antibody ( et-4-a-4 ) that recognizes a sulfated carbohydrate epitope in both keratan sulfate type i ( corneal ) and type ii ( skeletal ) was employed to quantify keratan sulfate in serum and corneal tissue from patients with macular corneal dystrophy ( mcd ) .
C0010031
corneal
C0024439
macular corneal dystrophy