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The Structural Basis for Each phyA-Specific Function.
N, N-terminal extension (1 to 78); PAS, PAS domain (79 to 185); GAF, GAF domain (218 to 402); PHY, PHY domain (413 to 593). The four small rectangles in the figure indicate the chromophores. The most and second-most important components of each phyA-specific function are indicated by black and gray lines, respectively.
