synthesis and secretion of this protein have previously been shown to be stimulated by transformation or treatment with tumor-promoting phorbol esters , but its function is still not known [ gottesman , m. m. ( 1978 ) proc , natl . acad . sci . u.s.a. 75 , 2767 -- 2771 ; gottesman , m. m. , & sobel , m. e. ( 1980 ) cell ( cambridge , mass . ) 19 , 449 -- 455 ] .
C0027651
tumor
C0577559
mass