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The molecular basis of color vision in colorful fish: Four Long Wave-Sensitive (LWS) opsins in guppies (Poecilia reticulata) are defined by amino acid substitutions at key functional sites

Matthew N Ward, Allison M Churcher, Kevin J Dick, Chris RJ Laver, Greg L Owens, Megan D Polack, Pam R Ward, Felix Breden* and John S Taylor*

BMC Evolutionary Biology 2008, 8:210  doi:10.1186/1471-2148-8-210

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