Structure of the GUS:ElonginBC complex. Woo J et al. EMBO J. 2006;25:1353-1363 ©2006 by European Molecular Biology Organization Structure of the GUS:ElonginBC complex. (A) Ribbon drawing of the GUS:ElonginBC complex. The α‐helices of GUS are in either red or magenta (for BC box), sheet A in orange, and sheet B in green. The domain organization of GUSTAVUS is shown. The region in yellow on the diagram indicates the fragment of the protein used for the structure determination. (B) Ribbon drawing of the B30.2/SPRY domain of GUS. The secondary structural elements are sequentially labeled and colored as in (A). The SPRY domain in GUS is indicated by color‐coding the secondary structural elements.