to translationally fuse egfp to the 5' end of csIAsc the 551-pb promoter region of csIAsc was amplified from genome DNA using the primer pcsIAsc5 and pcaIAsc6and then digested with bamHI and NdeI and cloned between the BglII and NdeI sites of pHL117,which has the c31 phage integration function region and can integrate into the S.coelicolor chromosome (23) generating pHL177