label: phycoerythrobilin-L-cysteinyl(48)/L-cysteinyl(59)-[C-phycoerythrin beta-subunit] <=> apo-L-cysteinyl(48)/L-cysteinyl(59)-[C-phycoerythrin beta-subunit] + (2R,3E)-phycoerythrobilin
label_lc: phycoerythrobilin-l-cysteinyl(48)/l-cysteinyl(59)-[c-phycoerythrin beta-subunit] <=> apo-l-cysteinyl(48)/l-cysteinyl(59)-[c-phycoerythrin beta-subunit] + (2r,3e)-phycoerythrobilin