Prompt
Generate a realistic portrait of Robert Lefkowitz, a middle-aged American physician, chemist, and professor, sitting in a professional setting, possibly in front of a laboratory or university background, with a thoughtful expression, wearing a white lab coat, and holding a pen or a small notebook, symbolizing his work on G protein-coupled receptors, with subtle hints of his awards, such as a Nobel Prize medal or a National Medal of Science, in the background or on his desk.
