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The backbone conformation was obtained with XPLOR-NIH software (Schwieters et al., 2003) constraining the dihedral angles of the residues showing helical chemical shifts. The conformation of the side chains is arbitrary. Electrostatic surface calculated with APBS (Baker et al., 2001) illustrates the positively charged N-terminal domain of TLQP-21 and primarily neutral C-terminal domain.
