A β sheet is made when ______________ form between segments of a polypeptide chain that lie side by side.
举一反三
- Each polypeptide chain consists of a backbone that is adorned with a variety of chemical side chains. This polypeptide backbone is formed from a repeating sequence of the core atoms (_________) found in every amino acid.
- The spatial conformation of a protein mainly depends on A: α-helix and β-sheet B: the sequence of amino acids in polypeptide chain C: disulfide bonds in polypeptide chain D: hydrophobic effects in polypeptide chain E: hydrogen bonds in polypeptide chain
- An α helix is generated when a single polypeptide chain turns around itself to form a structurally rigid _______.
- Which of the following descriptions about β-sheet is correct? A: It belongs to the tertiary structure of proteins B: Two peptide chains can not be anti-parallel C: The side chain of amino acids alternately is located above the peptide unit D: The skeleton of the main chain is zigzag E: There is no hydrogen bond between β-sheet peptide chains
- The euro coins have a common side and a national side.