New Experimental Probes for Enzyme Specificity and Mechanism, Volume 685, the latest release in the Methods of Enzymology series, highlights new advances in the field with this new volume presenting interesting chapters on a variety of topics including Subverting Hedgehog Protein Autoprocessing by Chemical Induction of Paracatalysis, New Mechanistic Probes to Identify Novel Substrates for N-Myristoyltransferases, Phosphonate and a Fluorophosphonate Analogues of D Glucose 6 Phosphate as Active-Site Probes of 1L-Myo-Inositol 1 phosphate Synthase, Kinetic Mechanism of Nicotine-Degrading Enzyme Probed by Stopped-Flow Kinetic Analyses, Kinetics and Mechanism for Enzyme-Catalyzed Reactions of Substrate Pieces, and more. Additional chapters cover Kinetics and Mechanism for Reactions of Enzyme Pieces, Evaluation of allostery for the bienzyme assembly of a 3-deoxy-D-arabino heptulosonate-7-phosphate synthase and chorismate mutase, Recognition and Catalysis of Reactions of Chiral Substrates by Mandelate Racemase, Innovative and emerging modalities of EGFR kinase inhibitors, Characterization of the Aminoacrylate Intermediate of Tyrosine Phenol-Lyases, and much more.