c) Molecular abundance (abundancenormspec values calculated as summarized peptide PVs divided by the number of MS-accessible protein specific amino acids) of PIN subunits and ABCB19 in anti-GFP affinity purification of CL47-solubilized PIN1-GFP-expressing roots with a GFP-specific DARPin. Note the significant heteromerization of several endogenous PINs with PIN1-GFP and the absence of other abundant interaction partners (ABC19B shown as an example). 