Biological Significance 比旋光度mp ◇肌肉运动--乳酸是右旋体，（+)-乳酸+3.82° 53℃ 必乳糖发酵-乳酸是左旋体，（·)-乳酸-3.82° 53℃ 必牛奶变酸--外消旋体，（士)-乳酸 无旋光度 18C OH OH (R)(-)-epinephrine enzyme active site enzyme-substrate complex natural epinephrine Better Fit....More Active 肾上腺素 OH OH Poor Fit....Less Active OH used in medicine as a heart stimulant, CH vasoconstrictor,and bronchial relaxant. 白色到褐色之间的晶体化合物用作心脏兴奋剂、 血管收缩剂和支气管肌松弛剂 (S)-(+)-epinephrine unnatural epinephrine does not fit the enzyme's active siteBiological Significance 肾上腺素 used in medicine as a heart stimulant, vasoconstrictor, and bronchial relaxant. 白色到褐色之间的晶体化合物.用作心脏兴奋剂、 血管收缩剂和支气管肌松弛剂 Better Fit….More Active Poor Fit…. Less Active 比旋光度 mp ❖肌肉运动---乳酸是右旋体，（+）-乳酸 + 3.82° 53℃ ❖乳糖发酵---乳酸 是左旋体，（﹣）- 乳酸 - 3.82° 53℃ ❖牛奶变酸---外消旋体， （±）- 乳酸 无旋光度 18℃ ＊