Introduction

Proteomics is the study of protein structure and function. Mass spectrometry measures the m/z (mass to charge) ratio of particles. So mass spectrometry based proteomics is the study of protein structure and function by identifying the m/z ratio of proteins or pieces of proteins called peptides. Mass spectrometry can identify thousands of proteins in a single analysis. Our goal is to identify and quantitate changes in protein concentration and phosphorylation in the PAS kinase network as a result of PAS kinase perturbation.