We report the performance of our approaches for protein-protein docking and 
interface analysis in CAPRI rounds 20-26. At the core of our pipeline was the 
ZDOCK program for rigid-body protein-protein docking. We then reranked the ZDOCK 
predictions using the ZRANK or IRAD scoring functions, pruned and analyzed 
energy landscapes using clustering, and analyzed the docking results using our 
interface prediction approach RCF. When possible, we used biological information 
from the literature to apply constraints to the search space during or after the 
ZDOCK runs. For approximately half of the standard docking challenges we made at 
least one prediction that was acceptable or better. For the scoring challenges 
we made acceptable or better predictions for all but one target. This indicates 
that our scoring functions are generally able to select the correct binding 
mode.