Molecular crystal polymorphism does not sound like something you want in your kitchen, but you've probably had experience ...

This DNA polymorphism appears in at least nine species of walnut and has been stable for almost 40 million years. "It's pretty atypical to maintain variation over such a long time," Groh said.

Science Progress (1933-), Vol. 104, No. 2 (2021), pp. 1-10 (10 pages) No consistent results have been reached on the relationship of interleukin-1 (IL-1) rs1800587 polymorphism with the susceptibility ...