M. Hoppert et al., QUATERNARY STRUCTURE OF THE HYDROXYLAMINE OXIDOREDUCTASE FROM NITROSOMONAS-EUROPAEA, Archives of microbiology, 163(4), 1995, pp. 300-306
The hydroxylamine oxidoreductase from Nitrosomonas europaea was prepar
ed to apparent electrophoretic homogeneity. Electron microscopy of neg
atively stained preparations of the sample revealed an overall diamete
r of about 8.8 nm of the enzyme particle. The native structure was det
ermined as a tetrahedron-like assembly of identical subunits exhibitin
g four protein masses.