Analyse beta-sheets in proteins (para.pdb). What is the total number of hydrogen bonds that connect sheet 2 (residues 54-57) with sheet 3 (residues 75-78)?
5 hydrogen bonds
4 hydrogen bonds
O 3 hydrogen bonds
O 6 hydrogen bonds
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Explanation:
Another common secondary structure is the β pleated sheet, which contains extended stretches of polypeptide chain with hydrogen bonds between neighbouring strands. In parallel β pleated sheet, polypeptide strands run in the same direction (i.e. from N- to C-terminus) whereas in antiparallel β pleated sheet, neighbouring strands extend in opposite directions (
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