天门冬氨酸氨基转移酶（AST）又称谷草转氨酶（GOT），属细胞内功能酶，细胞外液含量极低，细胞内外梯度差大，心肌和肝细胞内外浓度差可达万倍至十多万倍。它广泛存在于人体各种组织细胞中，以心、肝细胞含量最为丰富，常将测定血清AST活性作为细胞，特别是心与肝细胞损伤的指 Aspartate aminotransferase (AST), also known as aspartate aminotransferase (GOT), is a functional enzyme in the cell, the extracellular fluid content is very low, intracellular and extracellular gradient difference, the concentration difference between the heart and liver cells can reach ten thousand times to ten Many times. It exists in a wide range of human tissue cells, the heart, the most abundant liver cells, serum AST activity is often measured as cells, especially heart and liver cell damage refers to