Chaperonins are a type of protein that assist in the proper folding of other proteins within cells. They provide a protective environment, allowing newly synthesized proteins to fold correctly without the risk of aggregation or misfolding. This process is crucial for maintaining cellular function and overall health. These molecular machines are typically large, multi-subunit complexes, with well-known examples including GroEL in bacteria and TRiC in eukaryotes. By facilitating correct protein folding, chaperonins play a vital role in cellular processes and help prevent diseases related to protein misfolding, such as Alzheimer's and Parkinson's.