Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:binds to an ATP-bound form of Hsp90, stabilizing the interaction between Hsp90 and its client proteins.(2) In addition, Hsp70 coimmunoprecipitated with endogenous FANCA in these cells (data not shown).
Category: