应用紫外-可见分光光度法(Ultraviolet and visible spectrophotometry,UV-Vis),圆二色谱法(Circular di-chroism,CD)和聚丙烯酰胺凝胶电泳法(Polyacrylamide gel electrophoresis,PAGE)研究了在不同阳离子溶液中形成G-四联体的构型及...应用紫外-可见分光光度法(Ultraviolet and visible spectrophotometry,UV-Vis),圆二色谱法(Circular di-chroism,CD)和聚丙烯酰胺凝胶电泳法(Polyacrylamide gel electrophoresis,PAGE)研究了在不同阳离子溶液中形成G-四联体的构型及其与蒽醌衍生物的相互作用方式。研究发现,不同取代基的蒽醌衍生物在溶液中与G-四联体有不同的相互作用方式及可能的光敏损伤机制,其中AQS2以嵌入的方式与G-四联体相结合而2,7-AQS2则是沟渠结合。展开更多
Protease activity in 13 doll fish, Andrias davidianus, digestive organs: tongue, esophagus, cardia, stomach, pylorus, duodenum, jejunum, ileum, rectum, cloacal chamber, liver, pancreas, gall bladder were analysed with...Protease activity in 13 doll fish, Andrias davidianus, digestive organs: tongue, esophagus, cardia, stomach, pylorus, duodenum, jejunum, ileum, rectum, cloacal chamber, liver, pancreas, gall bladder were analysed with gelatine polyacrylamide gel-electrophoresis (G-PAGE). Compared to rats and rhesus monkeys (Macaca mullatta tcheliensis), protease activity in the Andrias davidianus digestive system was more varied and stronger. The activity of acid proteases>that of the neutral proteases>that of the alkaline proteases. The kinds and activities of neutral and alkaline proteases in the Andrias davidianus digestive system wereare very different, while the kinds of acid proteases in them were very similar, but their activities are different. Analysing the activities of proteases in these organs shows that protease activity in the duodenum>that in rectum>that in stomach>that in pancreas>that in liver. Experimental results suggest that the function of the rectum and liver in Andrias davidianus may be as important as that of the duodenum and pancreas in food degradation .展开更多
The kinds and activities of proteolytic enzymes in the digestive systems (tongue, esophagus, stomach, duodenum, liver, pancreas and large intestine) of two Amur tiger cubs (Panthera tigris altaica) were investigated u...The kinds and activities of proteolytic enzymes in the digestive systems (tongue, esophagus, stomach, duodenum, liver, pancreas and large intestine) of two Amur tiger cubs (Panthera tigris altaica) were investigated using protein detection and SDS-G-PAGE. The results showed:1) the digestive system of Amur tiger cubs had 30 different kinds of proteolytic enzymes ; 2) the mostly optimal pH for these enzymes was a neutral environment, and an acid condition highly restrained their activity; 3) the proteolytic enzymes in the tongue and esophagus were fewer than in other digestive organs and their activities were weak as well; 4) the duodenum had the most kinds of proteolytic enzymes with the strongest activities under various pH conditions; 5) the 16 kD enzyme bands always existed under neutral and alkalescence pH conditions in all digestive organs except the tongue.展开更多
文摘应用紫外-可见分光光度法(Ultraviolet and visible spectrophotometry,UV-Vis),圆二色谱法(Circular di-chroism,CD)和聚丙烯酰胺凝胶电泳法(Polyacrylamide gel electrophoresis,PAGE)研究了在不同阳离子溶液中形成G-四联体的构型及其与蒽醌衍生物的相互作用方式。研究发现,不同取代基的蒽醌衍生物在溶液中与G-四联体有不同的相互作用方式及可能的光敏损伤机制,其中AQS2以嵌入的方式与G-四联体相结合而2,7-AQS2则是沟渠结合。
文摘Protease activity in 13 doll fish, Andrias davidianus, digestive organs: tongue, esophagus, cardia, stomach, pylorus, duodenum, jejunum, ileum, rectum, cloacal chamber, liver, pancreas, gall bladder were analysed with gelatine polyacrylamide gel-electrophoresis (G-PAGE). Compared to rats and rhesus monkeys (Macaca mullatta tcheliensis), protease activity in the Andrias davidianus digestive system was more varied and stronger. The activity of acid proteases>that of the neutral proteases>that of the alkaline proteases. The kinds and activities of neutral and alkaline proteases in the Andrias davidianus digestive system wereare very different, while the kinds of acid proteases in them were very similar, but their activities are different. Analysing the activities of proteases in these organs shows that protease activity in the duodenum>that in rectum>that in stomach>that in pancreas>that in liver. Experimental results suggest that the function of the rectum and liver in Andrias davidianus may be as important as that of the duodenum and pancreas in food degradation .
文摘The kinds and activities of proteolytic enzymes in the digestive systems (tongue, esophagus, stomach, duodenum, liver, pancreas and large intestine) of two Amur tiger cubs (Panthera tigris altaica) were investigated using protein detection and SDS-G-PAGE. The results showed:1) the digestive system of Amur tiger cubs had 30 different kinds of proteolytic enzymes ; 2) the mostly optimal pH for these enzymes was a neutral environment, and an acid condition highly restrained their activity; 3) the proteolytic enzymes in the tongue and esophagus were fewer than in other digestive organs and their activities were weak as well; 4) the duodenum had the most kinds of proteolytic enzymes with the strongest activities under various pH conditions; 5) the 16 kD enzyme bands always existed under neutral and alkalescence pH conditions in all digestive organs except the tongue.