Fig. 1: Phycocyanin rods are intrinsically more dynamic than the allophycocyanin core.
From: Mass spectrometry reveals the evolutionary conservation of phycobiliprotein complexes

Native mass spectrum of L. maxima (a, b) and G. crepidinum (c, d) phycobiliprotein extracts showing the dynamic equilibrium between the dimeric (αβ) and hexameric (αβ)3 phycocyanin (PC, blue) and allophycocyanin (APC, green) phycobiliprotein complexes.