Methods Chloramine-T technique was used to prepare labeled antigen, the reaction was stopped by additon of BSA. After sephadex G25 purification 125I AVP with high specific activity was obtained. The plasma samples were purified with C18 Sep-Pak column and the AVP concentration was determined by RIA.
Analysis of the products by dynamic light scattering shows the majority of Y_1-Sak molecules with high specific activity exist as monomer and fewer Y_1-Sak molecules aggregate to form dimmer and polymer.
In this project, we firstly expressed the xylanase with high specific activity from Streptomyces olivaceoviridis A1 in transgenic plants, in order to harvest the transgenic plants with high xylanase activity.
The material is based on an extremely finely divided carbon material (colloidal graphite), which ensures a high specific activity of laccase immobilized on it.
The results showed that LA-SOD had high specific activity, high stability and high rate of recovery.
The in-vitro nick translation reaction used to label DNA to high specific activity also produces aberrant DNA structures known as "snapback" hairpin loops.
The highest xylose consumption at the beginning of the fermentation process occurred using cells precultivated in xylose, which showed relatively high specific activity of glucose-6-phosphate dehydrogenase (EC 18.104.22.168).
By using Se-depleted rats and a75Se-tracer with a high specific activity, Se compounds present at only very low concentrations could be detected.