label: apo-L-cysteinyl(84)-[C-phycoerythrin beta-subunit] + (2R,3E)-phycoerythrobilin => phycoerythrobilin-L-cysteinyl(84)-[C-phycoerythrin beta-subunit]
label_lc: apo-l-cysteinyl(84)-[c-phycoerythrin beta-subunit] + (2r,3e)-phycoerythrobilin => phycoerythrobilin-l-cysteinyl(84)-[c-phycoerythrin beta-subunit]