网页编辑. Objective to construct E. coli K99 pilus expression vector.目的构建大肠杆菌K99菌毛表达载体。. Presented are methods of isolation of pili and pilus-like structures from Gram-positive bacteria including Streptococcus pneumoniae and compositions that include such isolated pili.提供了从包括肺炎链球菌在内的革兰 ...