A note on the two-dimensional representation of hydrogen bonding scheme in triose phosphate isomerase

When the backbone hydrogen bonding scheme of the protein triose phosphate isomerase is represented in the two-dimensional map where the donor residue number (i) is taken along the x-axis and the acceptor residue number (j) is taken along the y-axis, the (i, j)-map shows a characteristic pattern of (beta alpha)8-super-secondary structure.