monoclonal antibodies against a human plasminogen activator of m ( r ) approximately 52,000 ( hpa52 ) were derived by immunization of mice with an impure preparation of the enzyme ( urokinase ) , subsequent hybridization of spleen cells with nsi-ag4/1 myeloma cells , and cloning of the hybridomas .
C0086418
human
C0042071
urokinase