Nice to see a Chemical Engineer receive a Nobel prize, for work on random mutagenesis for industrial enzyme selection and improvements.  My PhD work was in enzyme applications, though not this particular area.

Dr. Arnold’s research has produced methods now routinely used to create new catalysts. Her work has led to new enzymes for pharmaceuticals, sustainable biofuels, and other environmentally friendly products.

Source: AIChE Fellow Frances Arnold Is One of Three Winners of 2018 Nobel Prize in Chemistry | AIChE