Oep24 of 213 aas.  High-conductance voltage-dependent solute channel with a slight selectivity for cations, transporting triosephosphates, dicarboxylic acids, ATP, inorganic phosphate (Pi), sugars, and positively or negatively charged amino acids. The central mitochondrial components that mediate the import of yeast β-barrel proteins can deal with precursors of chloroplast β-barrel proteins (Ulrich et al. 2012).  Targeting and surface recognition of mitochondrial β-barrel proteins in yeast, humans and plants depends on the hydrophobicity of the last β-hairpin of the β-barrel, but the presence of a hydrophilic amino acid at the C-terminus of the penultimate β-strand is also required for mitochondrial targeting (Klinger et al. 2019).