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:Proteins trafficked to the rhoptries involve the action of the normally endocytic Rab5 [22], adaptin 1 and sortillin [24] and a microneme proteome identified several proteins generally associated with recycling endosomes including Rab11 and syntaxin 13.
Category: