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Will proteins that are secreted by the Sec translocase during growth in laboratory media be secreted by the Tat translocase during infection?
Will proteins that are secreted by the Sec translocase during growth in laboratory media be secreted by the Tat translocase during infection?
25 May 2023
jagdishbhagatLv10
25 May 2023
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The introductory passage mentions that halomucin was predicted to contain a signal sequence and that later research found evidence of the protein outside of the H. walsbyi cell. What is the best description of a signal sequence?
Choose the best answer.
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Choose the best answer.
| A) A signal sequence is 15-20 residues of a protein that has a central hydrophobic region and polar ends. It facilitates folding in order to make transport across the membrane easier. |
| B) A signal sequence is 15-20 residues of a protein that has a central hydrophilic region and nonpolar ends. It is found only in bacteria, in which it marks a protein for export by the translocase system. |
| C) A signal sequence is 15-20 residues of a protein that has a central hydrophobic region and polar ends. It hampers folding, which could prevent efficient secretion, and marks the protein for export by the translocase system. |
| D) A signal sequence is 15-20 residues at the N terminus of a protein. It is found only in archaea, in which it marks a protein for export by the translocase system. |
| E) A signal sequence if 15-20 residues at the C terminus of a protein. It is found in archaeans and in bacteria and marks proteins for export by the translocase system. |
