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:On the other hand, SRC activation by BCAR3 (30, 32) has been recently shown to promote phosphorylation of the Tyr-789 motif of PTP , a receptor-type phosphatase that can potentiate SRC activation by dephosphorylating its inhibitory Tyr-527 phosphorylation site (37).
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