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:As a result, MEK protein, like the MAPK family of proteins, may comprise a family of enzymes regulated by a variety of stimuli and in different cell types (5, 10); (/>) disorders of phosphatase(s) that negatively regulate MAPK activity may exist.
Category: