Aim: De Ritis ratio (aspartate transaminase/alanine transaminase) may be a useful prognostic biomarker for certain malignant tumors. However, the predictive value of before treatment in preoperative staging patients with breast cancer is unknown. This study aimed to evaluate benign and diseases investigate it cancer. 
 Methods: Retrospective analysis was made clinicopathological data 301 d...

Liver of rat foetuses from 14 to 19 days of gestation and cultured hepatocytes derived from foetuses of 14 or 15 days gestation show a limited capacity to transaminate tyrosine. This low tyrosine transamination activity can be ascribed to aspartate aminotransferase. Definitive tyrosine aminotransferase can be demonstrated in 1-day-old cultures of hepatocytes taken from 19-day foetuses, but not ...

Dexamethasone, insulin, and serum induce an additive increase in the activity of tyrosine aminotransferase (L-tyrosine : Z-oxoglutarate aminotransferase, EC 2.6.1.5) in hepatoma cells in tissue culture. By the criteria of immunotitration, heat stability, and electrophoresis on polyacrylamide gels, we have shown previously that all three effecters increase the cellular concentration of the same ...