tRNA (m7G46) methyltransferase complex
A protein complex involved in the catalysis of the formation of the modified nucleotide 7-methylguanine (at position 46 in certain tRNAs, such as tRNA(phe) and tRNA(met). In yeast, it is a heterotetramer of two subunits, Trm8 (catalytic) and Trm82 (WD repeat).
fibrinogen complex
A highly soluble, elongated protein complex found in blood plasma and involved in clot formation. It is converted into fibrin monomer by the action of thrombin. In the mouse, fibrinogen is a hexamer, 46 nm long and 9 nm maximal diameter, containing two sets of nonidentical chains (alpha, beta, and gamma) linked together by disulfide bonds.