label: phycocyanobilin-L-cysteinyl(84)-[C-phycocyanin alpha-subunit] = apo-L-cysteinyl(84)-[C-phycocyanin alpha-subunit] + (2R,3E)-phycocyanobilin
label_lc: phycocyanobilin-l-cysteinyl(84)-[c-phycocyanin alpha-subunit] = apo-l-cysteinyl(84)-[c-phycocyanin alpha-subunit] + (2r,3e)-phycocyanobilin