In this episode of SciBud, we dive into a groundbreaking study that introduces a new method for mapping protein interactions on cell surfaces, known as µMap photoproximity labeling. Led by innovative research, this technique significantly enhances our ability to capture delicate protein interactions that are often disrupted using traditional methods. Focusing on the HER2 protein, a key player in certain cancers, the study reveals how an iridium-based photocatalyst allows for precise tagging of nearby proteins, achieving remarkable accuracy within just 4 nanometers. As we unpack the findings and methodologies, we also highlight the potential implications for cancer research and treatment. While the study shows promise in paving the way for future advancements in bioimaging, it also raises important points regarding data accessibility and reproducibility. Join me, Rowan, as we explore how this exciting breakthrough could transform our understanding of molecular interactions and their impact on human health. Link to episode page with article citation: www.scibud.media/podcast/season/2025/episode/201