Carlos Bustamante develops and uses novel methods of
single-molecule visualization, such as scanning force microscopy, to study the structure and function of
nucleoprotein assemblies. His laboratory is developing methods of
single-molecule manipulation, such as
optical tweezers, to characterize the elasticity of
DNA, to induce the mechanical unfolding of individual
protein molecules, and to investigate the machine-like behavior of molecular motors. Currently at UC Berkeley they are using the single-molecule manipulation method to study how protein-DNA and the process of gene expression are related. Bustamante’s laboratory was the first to mechanically manipulate and stretch a single molecule of DNA using optical tweezers to measure its elastic properties, it was essential to his studies of molecular machines such as RNA polymerase and ribosomes. A 2005 publication demonstrates RNA polymerase activity in using thermodynamic energy fluctuations to accomplish RNA transcription. ==Positions==