根拠: gel filtration, The protein elutes with a molecular weight that is larger than a trimer but smaller than a hexamer. Within the asymmetric unit, there are 8 molecules; two trimers and two ...根拠: gel filtration, The protein elutes with a molecular weight that is larger than a trimer but smaller than a hexamer. Within the asymmetric unit, there are 8 molecules; two trimers and two single subunits. These chains along with symmetry mates generate two dodecamers in the A.U. Each single subunit (chains F and A) with its symmetry mates comprises a second trimer. Symmetry mates of each trimer (CEH or BGD) make up the remaining two trimers that form a dodecamer.