09 September 2016 0 8K Report

What physical forces are at work in anion-pi interactions such that the residue (i.e. Tyrosine) with an aromatic ring when interacting with negatively charged Aspartate will have a positive dipole. In the research paper that I will reference the authors mention that the arene is electron deficient. I don't get how that works.

If you would be so kind, please see paragraph 2 of the introduction to this research paper and please explain to me what the authors are communicating. 

Source: http://onlinelibrary.wiley.com/doi/10.1002/chem.201304995/full

Thank you very much!

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