Reaction catalyzed by phycoerythrocyanin alpha-cysteine-84 phycoviolobilin lyase/isomerase (4.4.1.31)

	[phycoerythrocyanin alpha-subunit]-Cys84-phycoviolobilin	=		apo-[phycoerythrocyanin alpha-subunit]	+
	[phycoerythrocyanin alpha-subunit]-Cys84-phycoviolobilin	=		apo-[phycoerythrocyanin alpha-subunit]	+		(2R,3E)-phycocyanobilin