label: phycocyanobilin-L-cysteinyl(155)-[phycoerythrocyanin beta-subunit] <=> apo-L-cysteinyl(155)-[phycoerythrocyanin beta-subunit] + (2R,3E)-phycocyanobilin
label_lc: phycocyanobilin-l-cysteinyl(155)-[phycoerythrocyanin beta-subunit] <=> apo-l-cysteinyl(155)-[phycoerythrocyanin beta-subunit] + (2r,3e)-phycocyanobilin