Lauerman L H, Ruppanner R, Norman B B, Adams C J, Farver T B
Am J Vet Res. 1982 May;43(5):884-6.
Mean concentrations for total serum protein and serum protein fractions, and mean activities for total lactate dehydrogenase (LDH) and LDH isoenzymes were determined in 114 crossbred yearling cattle during a 56-day feeding trial. These values were to be used as predictors of performance (weight gain). The mean total serum protein concentration on day 0 was high (7.27 g/dl), reached a low on days 7 and 14 (6.47 and 6.50 g/dl), and then equilibrated toward the end of the study. The mean concentration for the albumin fraction also reached a low on days 7 and 14 (2.83 and 2.84 g/dl) and then increased, remaining steady until termination of the feeding trial. The alpha-, beta-, and gamma-globulin fractions fluctuated throughout the study. The mean for total LDH activity peaked on day 21 (1,363 IU) and then remained relatively constant through day 56. Mean serum activities for the LDH3 activity peaked on day 7 (27%) and then decreased progressively to day 56 (17%). The overall trend for LDH4 and LDH5 activities seemed to be a steady increase.
在一项为期56天的饲养试验中，测定了114头杂种一岁龄牛的血清总蛋白和血清蛋白组分的平均浓度，以及总乳酸脱氢酶（LDH）和LDH同工酶的平均活性。这些值将用作性能（体重增加）的预测指标。第0天的血清总蛋白平均浓度较高（7.27 g/dl），在第7天和第14天降至较低水平（6.47和6.50 g/dl），然后在研究结束时趋于平衡。白蛋白组分的平均浓度在第7天和第14天也降至较低水平（2.83和2.84 g/dl），然后升高，在饲养试验结束前保持稳定。α-、β-和γ-球蛋白组分在整个研究过程中波动。总LDH活性的平均值在第21天达到峰值（1363 IU），然后在第56天一直保持相对稳定。LDH3活性的平均血清活性在第7天达到峰值（27%），然后逐渐下降至第56天（17%）。LDH4和LDH5活性的总体趋势似乎是稳步上升。
