Phycoerythrin alpha-3 chain, chloroplastic Light-harvesting photosynthetic tetrapyrrole chromophore-protein from the phycobiliprotein complex. MFAKTLASLAVIGSAAAYVPMMSMDMGRREVVQAGAAAAAVTPFLSGAPAGAAMDKSAKAPQITIFDHRGCSRAPKESTGGKAGGQDDEMMVKVASTKVTVSESDAAKKLQEFITFEKGIDGPFTSKN cpeA3 PHE3_RHDS2 128