本研究获取人类补体C3上与补体Ⅲ型受体(CR3)结合的功能区rC3B,并进行了表达、纯化和活性鉴定。用基因扩增法获得rC3B基因,并插入原核表达载体pQE30a,转化大肠杆菌E.coli M15进行表达;用SDS-PAGE电泳检验目的蛋白后以Ni2+螯合Sepharose ...本研究获取人类补体C3上与补体Ⅲ型受体(CR3)结合的功能区rC3B,并进行了表达、纯化和活性鉴定。用基因扩增法获得rC3B基因,并插入原核表达载体pQE30a,转化大肠杆菌E.coli M15进行表达;用SDS-PAGE电泳检验目的蛋白后以Ni2+螯合Sepharose Fast Flow层析进行纯化;用Western blot与单核细胞黏附试验初步确认蛋白活性。结果表明:钓取了人类补体C3的功能片段rC3B,构建了原核表达载体pQE30-rC3B并在E.coli中得了到高效表达;经Ni2+固相化的螯合Sepharose Fast Flow亲和层析纯化蛋白后,蛋白纯度达80%;Western blot检测证明rC3B具有抗原性,单核细胞的黏附试验初步确认了纯化后蛋白的活性。结论:确认了人类补体C3的这一活性区域,并获得了该蛋白的功能片段,为深入研究人类补体C3蛋白的功能和应用奠定了基础。展开更多
Spherical carbon particles were prepared by using waste Guilin rice noodles as raw materials.By blending the rice noodles based carbon(RC)powders with polylactic acid(PLA),A series of black RC/PLA 3D printing composit...Spherical carbon particles were prepared by using waste Guilin rice noodles as raw materials.By blending the rice noodles based carbon(RC)powders with polylactic acid(PLA),A series of black RC/PLA 3D printing composites were synthesized and characterized.The mechanical testing result shows that the RC/PLA 3D printing composites display better mechanical properties than that of pure PLA.Moreover,the composite with carbon treated with high temperature carbonization has better impact strength.展开更多
文摘本研究获取人类补体C3上与补体Ⅲ型受体(CR3)结合的功能区rC3B,并进行了表达、纯化和活性鉴定。用基因扩增法获得rC3B基因,并插入原核表达载体pQE30a,转化大肠杆菌E.coli M15进行表达;用SDS-PAGE电泳检验目的蛋白后以Ni2+螯合Sepharose Fast Flow层析进行纯化;用Western blot与单核细胞黏附试验初步确认蛋白活性。结果表明:钓取了人类补体C3的功能片段rC3B,构建了原核表达载体pQE30-rC3B并在E.coli中得了到高效表达;经Ni2+固相化的螯合Sepharose Fast Flow亲和层析纯化蛋白后,蛋白纯度达80%;Western blot检测证明rC3B具有抗原性,单核细胞的黏附试验初步确认了纯化后蛋白的活性。结论:确认了人类补体C3的这一活性区域,并获得了该蛋白的功能片段,为深入研究人类补体C3蛋白的功能和应用奠定了基础。
基金supported by grants of the National Nature Science Foundation of China(No.51763007)National Undergraduate Innovation and Entrepreneurship Training Program(No.201910596205).
文摘Spherical carbon particles were prepared by using waste Guilin rice noodles as raw materials.By blending the rice noodles based carbon(RC)powders with polylactic acid(PLA),A series of black RC/PLA 3D printing composites were synthesized and characterized.The mechanical testing result shows that the RC/PLA 3D printing composites display better mechanical properties than that of pure PLA.Moreover,the composite with carbon treated with high temperature carbonization has better impact strength.