Preliminary structure analysis of canavalin from Jack Bean

The plant seed protein canavalin has been crystallized alter trypsinization by using vapor diffusion to effect isoelectric precipitation. The space groups and cell dimensions are R3 with ā = 81.3 Å, γ = 111 ° and having extremely high R32 pseudo symmetry, P63 with ā = 126 Å andc̄ = 51 Å, C2221, withā = 136 Å, b̄ = 152 Å, andc̄ = 131 Å. X-ray data combined with electron microscopy suggests the molecule to be composed of six identical...