Coulson R A, Hernandez T
J Nutr. 1979 Apr;109(4):538-50. doi: 10.1093/jn/109.4.538.
Energy required for protein digestion, amino acid absorption and transport, and for protein synthesis in the alligator was estimated by determining oxygen consumption following feeding of single amino acids, various amino acid mixtures, fish, casein, gelatin, zein, and a gelatin hydrolysate. Results suggested a low energy requirement for protein digestion, for absorption of the released amino acids, and for amino acid transport, and a high energy requirement for protein synthesis. Little energy was needed for absorption and transport of neutral single amino acids but absorption of single ionic amino acids appeared to require energy. The alligator's metabolic rate is so low that processes requiring extra energy increased oxygen consumption as much as 300%. Peptide bond synthesis seems to have been responsible for the 3-fold increase in metabolic rate after feeding protein. Whether that phenomenon should be called "specific dynamic action" is problematical.
通过测定投喂单一氨基酸、各种氨基酸混合物、鱼类、酪蛋白、明胶、玉米醇溶蛋白和明胶水解物后短吻鳄的耗氧量，估算了短吻鳄蛋白质消化、氨基酸吸收与转运以及蛋白质合成所需的能量。结果表明，蛋白质消化、释放氨基酸的吸收以及氨基酸转运所需能量较低，而蛋白质合成所需能量较高。中性单一氨基酸的吸收和转运所需能量较少，但单一离子氨基酸的吸收似乎需要能量。短吻鳄的代谢率极低，以至于需要额外能量的过程会使耗氧量增加多达300%。肽键合成似乎是投喂蛋白质后代谢率提高3倍的原因。这种现象是否应被称为“特殊动力作用”存在争议。
