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. 2011 Aug 9;67(Pt 9):813–821. doi: 10.1107/S0907444911027806

Figure 1.

Figure 1

The SWT and SWTB tetramers. (a) The four crystallographically unique subunits in the SWT tetramer (subunits A, B, C and D) are related by noncrystallographic twofold axes P, Q and R (Hendrickson et al., 1989 ▶). Subunit A is shown in red, subunit B in purple, subunit C in green and subunit D in orange. (b) The SWTB tetramer. The A and B subunits (yellow and blue, respectively) are crystallographically unique. Subunits C and D (brown and gray–blue) are related to subunits A and B by a crystallographic dyad coincident with the P axis. This figure was drawn with MolScript (Kraulis, 1991 ▶) and RASTER3D (Merritt & Bacon, 1997 ▶).