3.1.2.1 ? x * 43000, SDS-PAGE 664215 3.1.2.1 dimer - 94476, 94479 3.1.2.1 dimer 2 * 62000, SDS-PAGE 651098 3.1.2.1 dimer 2 * 62017, calculation from nucleotide sequence 651098 3.1.2.1 dimer 2 * 63000, SDS-PAGE 94475 3.1.2.1 dimer 55.7% of mutant form lacking START domain form a mixture of active tetramers (31%) and dimers (23.9%) 732297 3.1.2.1 hexamer crystal structure 731079 3.1.2.1 monomer sucrose density gradient centrifugation 94477 3.1.2.1 tetramer - 94475, 94476, 94479 3.1.2.1 tetramer 4 * 64000, SDS-PAGE 94472 3.1.2.1 tetramer 4 * 77000 kDa, 45% of wild-type form active tetramers. 55.7% of mutant form lacking START domain form a mixture of active tetramers (31%) and dimers 23.9% 732297