S334ter rhodopsin (Rho) rats (line 4) express rhodopsin gene containing an early termination codon at residue 334 and is a model of a number of Rho truncation mutations in human RP patients (http://www.ask.com/wiki/Retinal_Degeneration_(Rhodopsin_Mutation). Here, RHO is linked to retinitis pigmentosa 1.