an atypical thermolabile species of hex b ( hexosaminidase b ) has been found in metastatic-tumour sites of human liver which has a thermostability curve similar to that of hex a ( hexosaminidase a ) , which is present in decreased amounts relative to the hex a isoenzyme , and which exhibits decreased relative activity at acidic ph values ( 2.6-3.6 ) when compared with control-liver hex b .
C0494165
metastatic-tumour
C0023884
liver