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:mTORC2 contains rictor and phosphorylates Akt at S473, which, in conjunction with the PDK1-mediated phosphorylation at T308, drives full activation of Akt (Wullschleger et al., 2006; Dann et al., 2007; Guertin and Sabatini, 2007; Yang and Guan, 2007).
Category: