Its ninhydrin reaction was negative, but after acid hydrolysis, its ninhydrin reaction and biuretreaction were positive.
茚三酮反应呈阴性，用酸水解后茚三酮反应和双缩脲反应呈阳性。
2
The precipitation is egg albumin. We can take little precipitation (about matchhead size) in 1ml of distilled water, observe whether it is dissolved, identify by biuretreaction.
球蛋白在半饱和硫酸铵溶液中即可析出，而清蛋白需在饱和硫酸铵溶液中才能析出。
3
Method U. S Standardization Com mission's standard file EP10-T2 was used to select representative ALT and TP. AL T was determined with the enzyme reaction, TP was determined with biuretreaction .