. . "SUBUNIT" . "METHYLATION AT ASN-72" . "X-RAY CRYSTALLOGRAPHY (2.8 ANGSTROMS) IN COMPLEX WITH PHEA; PHYCOERYTHROBILIN AND PHYCOUROBILIN" . "CHROMOPHORE BINDING AT ASN-35; ASP-39; CYS-50; ASP-54; CYS-61; ASN-72; CYS-82 AND CYS-158" . . . .