pyp PYP_HALHA Photoactive blue-light protein. Probably functions as a photoreceptor for a negative phototaxis response. 125 Photoactive yellow protein MEHVAFGSEDIENTLAKMDDGQLDGLAFGAIQLDGDGNILQYNAAEGDITGRDPKQVIGKNFFKDVAPCTDSPEFYGKFKEGVASGNLNTMFEYTFDYQMTPTKVKVHMKKALSGDSYWVFVKRV