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:For detection of Glut 1, 7.5% gels were loaded with 30 mg protein and probed with 1:200 dilution of Glut1 antibody (Santa Cruz Biotechnologies, # sc-1605).
Category: