1.20.9.1	dimer	1 * 87000 + 1 * 29000, SDS-PAGE	
1.20.9.1	dimer	1* 85000, subunit LSU, plus 1 * 14000, subunit SSU, SDS-PAGE	
1.20.9.1	monomer	SDS-PAGE	
1.20.9.1	additional information	heterodimer