Co-chaperonin complex is required for substrate encapsulation during assisting the folding of the unfolded protein with the chaperonin complex. Co-chaperonin also termed as GroES, Cpn10 and Hsp10. CPN10-I (AT1G14980) is a mitochondrial-localized chaperonin 10 protein and its mRNA is upregulated in response to heat shock treatment and is expressed uniformly in various organs.