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:Also we show that the H-Ras mutant C181S creates the highest amount of rasosomes relative to the other palmitoylated Ras proteins, this complements the recent results which shows that this mutant has the lowest tendency to be solubilized by PDE6d.18 Hence, rasosomes can act as an alternative mode for transfer of hydrophobic Ras that cannot be carried by PDE6d.
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