Science: v.1-v.219

acid actin activity addition American analysis animals appear applied associated cells chromatography complete compounds concentration containing cost Department determined direct effect energy example experiments factor field function given human important increase indicate Institute laboratory less light limited mass material means measured mechanism ment Michigan million myosin natural normal Notes nuclear observed obtained occur operation organic percent period physical plants Pleistocene position possible present Press problems produced protein range reaction recent recorded References region relative reported represents response sample Science scientific selection separated Service similar solution species structure studies suggested surface Table temperature tion units Univ University York