University of Leicester biologists discover plant cell regulation process affects chloroplasts Chloroplast images available from pt91@le.ac.uk Biologists may have unearthed the potential to manipulate the functions of chloroplasts, the parts of plant cells responsible for photosynthesis. Researchers in the University of Leicester’s Department of Biology discovered that chloroplasts are affected by the ubiquitin proteasome system (UPS) – a process which causes the breakdown of unwanted pro...