Fig. 3. Sequence and surface conservation of PHR2 domains.
(a) Sequence alignment of the second PHR (PHR2) domains of PHR proteins from fourteen organisms. Secondary structural elements are color coded as in Fig. 1b. Cys1745 and Cys1860 are labeled in magenta asterisks. (b) Sequence conservation of PHR2 mapped on the surface of the MmPHR2 structure, using the same color coding and views as in Fig. 2.