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Single molecule manipulation techniques reveal that the mechanical resistanceof a protein depends on the direction of the applied force. Using a latticemodel of polymers, we show that changing the pulling direction leads todifferent phase diagrams. The simple model proposed here indicates that in onecase the system undergoes a transition akin to the unzipping of a $\beta$sheet, while in the other case the transition is of a shearing (slippage)nature. Our results are qualitatively similar to experimental results. Thisdemonstrates the importance of varying the pulling direction since this mayyield enhanced insights into the molecular interactions responsible for thestability of biomolecules.Comment: RevTeX v4, 10 pages with 6 eps figure

Does Changing the Pulling Direction Give Better Insight into Biomolecules?