Nanoparticle asymmetry shapes an immune response

Shape is all-important for molecules, especially when it comes to a property known as chirality .

A chiral molecule exists in two forms, called enantiomers, that are chemically identical, but are mirror images of each other, and that interact with other molecules in different ways. Chiral molecules have long been used in drug design — and some molecules can even be tailored to interact with the body in enantiomer-specific ways.

- Francis Crick, Nobel Prize recipient for discovery of DNA structure: 'Every time I write a paper on the origin of life, I determine I will never write another one, because there is too much speculation running after too few facts.' ('Life Itself,' p. 153)

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