Proteolytic digestion of phycobilisomes. (A) Digestion of phycobilisomes with formic acid. The arrow indicates the resulting fragment after Zn2+ stain at 2.78 kDa. There are also several signals at 17–20 kDa which refer to the unaffected α-subunit of phycocyanin and the α- and β-subunit of allophycocyanin.
Bolte et al. BMC Plant Biology 2008 8:56 doi:10.1186/1471-2229-8-56