Complex sentence: PDC is a large complex composed of multiple copies of 3 or 4 subunits depending on species: in Gram-negative bacteria, e.g. "Escherichia coli", PDC consists of a central octahedral core made up from 24 molecules of dihydrolipoyl transacetylase (E2).
Split into simpler sentences: PDC is a large complex composed of multiple copies of 3 or 4 subunits depending on species. In Gram-negative bacteria, e.g. "Escherichia coli", PDC consists of a central octahedral core made up from 24 molecules of dihydrolipoyl transacetylase (E2).