Protein Kinase, MKK6, is an important kinase involved in regulating cell growth. Here we provide an analysis on the expression pattern of MKK6. This book carries analysis of esophageal, stomach, breast, colon and rectal cancers with regards to the expression behaviour of MKK6 protein. This book carries in-depth literature survey on Mitogen activated protein kinase kinase 6. We hope it will be helpful to the followers in scientific community.