 | Acta Crystallographica Section F Acta Crystallographica Section F STRUCTURAL BIOLOGY COMMUNICATIONS |
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![[Figure 2]](va5043fig2mag.jpg)
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Figure 2
(a) The crystal structure of the active form of the E. coli HMBS enzyme in ribbon format (PDB entry 1ah5); the cofactor is in the middle of the picture. (b) An enlargement of the dipyrromethane cofactor; the right-hand cofactor ring (referred to in the text as C1) is covalently attached to the labelled Cys242 (Cys261 in the human enzyme). The Asp side chain (Asp84 in E. coli HMBS and Asp99 in human HMBS) is visible just below the cofactor towards its left-hand side. This figure was produced by CCP4mg (McNicholas et al., 2011  ). |
![[Figure 2]](va5043fig2.jpg)
| STRUCTURAL BIOLOGY COMMUNICATIONS |
ISSN: 2053-230X
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