AY327139 5189 7 87 T5 AY327139 5189 115 171 Avi-tag AY327139 5189 172 1275 Escherichia coli maltose binding protein AY327139 5189 1276 1317 multiple cloning site AY327139 5189 1318 1338 6*His-tag AY327139 5189 3312 3968 ColE1