Integrated Methods in Protein Biochemistry: Part A, Volume 677, the latest release in the Methods in Enzymology series, highlights new advances in the field with this new volume presenting interesting chapters on topics such as DNA and protein engineering to create protein bioswitches with new functions, Interaction and cross-talk of prelamin A with integral membrane zinc metalloproteases, An experimental protocol to study lipid transfer proteins, Synthesis of small heat shock proteins, Druggable p-p interacting sites for Co-chaperone DNAJA1 and its partner proteins, An experimental protocol for glycoconjugate analysis, Methods for proximity-based biotinylation combined with Mass Spectrometry, and more. Additional chapters cover Synthetic antibody fragments as conformational sensors of protein activation and trafficking, Expression, purification, functional analysis and crystallization of Rag GTPase, Purification of bacterial transcription elongation complexes by photoreversible immobilization, Inhibition of c-Myc-MAX heterodimerization, Fluorogenic RNA aptamers to probe transcription by multi-subunit RNA polymerases, and much more.