the occurrence and levels of cathepsin b activity were investigated in primary human lung tumors and lung metastases of renal , colorectal and urinary bladder carcinomas as well as in the associated apparently normal lung parenchyma using a continuous rate enzyme assay with ac-leu-arg-arg-nhmec ( 7- ( n-acetyl-l-leucyl-l-arginyl-l-arginylamido ) -4-methylcoumarin ) as the fluorogenic substrate .
C0024109
lung
C0153676
lung metastases of