Integrated Methods in Protein Biochemistry: Part C, Volume 679 in the Methods in Enzymology series, highlights new advances in the field with this new volume presenting interesting chapters on a variety of topics, including NanoBiT-based methods to monitor the activation and modulation of RTKs, The interplay of G-protein ß? subunit and PLC-ß enzyme in PIP2 hydrolysis and downstream signaling, Biochemical Analysis of Protein-Protein Interfaces underlying the regulation of Bacterial Secretion Systems, Probing the structure and function of N-acetylmannosamine-6-phosphate 2-epimerase, Spectroscopic analysis of cysteine dioxygenase: a mammalian thiol-dioxygenase, DeGlyPHER: MS-based analysis of viral spike N-glycoforms, and more. Other sections cover Covalent protein painting: MS-based protein footprinting, Characterization of GPCR signaling complexes using negative-staining electron microscopy, Probing protein misfolding and dissociation with free electron laser, Optimized protocol for the characterization of Cas12a activities, Proximity proteomics for the identification and characterization of extracellular vesicles, Functional characterization of lytic polysaccharide monooxygenases (LPMOs), Characterization of RRE domain in RiPP biosynthesis, The Preparation of Recombinant Arginyltransferase 1 (ATE1) for Structural and Biophyiscal Characterizations, Testing anti-cancer drugs with Holographic Incoherent-light-source Quantitative Phase Imaging, and more.