C2 Space Research Articles

A preliminary crystallographic study of wheat germ agglutinin

Wheat germ agglutinin crystallizes in two monoclinic space groups, P2 1 and C2, under identical crystallization conditions. Unit cell dimensions are a = 73.8 A ̊ , b = 51.2 A ̊ , c = 90.8 A ̊ , γ = 90 ° for P2 1; a = 51.31 A ̊ , b = 73.35 A ̊ , c = 91.45 A ̊ , β = 97.75 ° for C2, both with eight subunit molecules in the unit cell. The C2 crystals were chosen as suitable for investigating the three-dimensional structure to high resolution, because of their smaller asymmetric unit (containing the dimer), and also because they display better diffraction patterns.

Even diameters of the classes W(r)H ? in the space C2?

For even values of n we find the exact values of the diameters dn(W(r)Hω) of the classes of 2π-periodic functions (Ω(t) is an arbitrary convex upwards modulus of continuity) in the space C2π. We find that d2n(W(r)Hω)=d2n−1(W(r)Hω) (n=1, 2, ... r=0, 1, 2, ...).