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(a) Schematic predicting a coiled-coil region in HBHA obtained by using the algorithm of Lupas (20, 21). (b) Predicted heptad repeats found in the coiled-coil domain of HBHA. Numbers on the left are the amino acid residues. The number of predicted α-helical turns within a given coiled-coil turn (3.6 residues per turn) is shown at the right. Hydrophilic amino acids are in uppercase, and hydrophobic amino acids are in lowercase.
