Every time you move a muscle, form a thought, or take a breath, the seamless experience is powered by millions of microscopic protein machines called SNAREs — and the staggering part is that the energy your brain burns doesn't come from firing the signal, it comes from violently resetting the trap afterward. SNARE proteins are the docking machinery that allows tiny cellular shipping containers called vesicles to fuse with their target membranes and deliver their chemical payloads. The system works like a spacecraft docking with a space station: proteins from the vesicle (R-SNAREs like synaptobrevin, contributing an arginine residue) reach out and intertwine with proteins on the target membrane (Q-SNAREs like syntaxin and SNAP-25, contributing glutamine residues), forming a four-stranded coiled rope that zippers from top to bottom, storing massive ...