Stanford Ask a Scientist is now featuring three new Stanford scientists who are eager to answer your science questions! Dave G. and Leighton W. are graduate students and Nicholas W. is a post-doc here at Stanford. This brings us to a total of six scientists available to answer your questions, and more are on the way! Dave G. studies how DNA structure influences gene expression in the Genetics department. He is really excited to talk to you about how he studies how T-Cells cha