Vitamin B12 import proteins,molecular model. This complex is the import proteins btuC,btuD,and btuF. The first two together form BtuCD,an adenosine triphosphate (ATP)-binding cassette transporter. Its role is to translocate vitamin B12 from BtuF (a periplasmic binding protein) into the cytoplasm of the bacterium Escherichia coli. ATP-binding cassette transporters (ABC transporters) are being studied in relation to their role in a range of inherited diseases and processes,including resistance to tumours,and conditions such as cystic fibrosis | |
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