0): e0000000. Citation: The PLOS Biology Editors (0000) Expression of concern: A chaperonin subunit with unique structures is essential for folding of a specific substrate. The PLOS Biology Editors (0000) Expression of concern: A chaperonin subunit with unique structures is essential for folding of a Specific Substrate. The authors have not commented on the availability of underlying data to support the other results reported in the 