Immunogen sequence: PLPEAQRAGL VASGPSLTSA PYAMTYAPAS AFCSSPSAYG SPSSYFSGLD PYLSPMVPQL GGPALSPLSG PSVGPSLAQS PTSLSGQSYG AYSPVDSLEF K. The cone-rod homeobox-containing gene (CRX) encodes a transcription factor that coordinates the expression of several pho