Cartoon representation of hen eggwhite lysozyme, the first enzyme structure solved:
http://en.wikipedia.org/wiki/Lysozyme

The catalytic residues (Glu35 and Asp52) and disulfide bonds are represented as spheres.

Me3D

Yes

Yes

Successfully printed on a Me3D in ABS.

The model was created using Protein Data Bank entry 1DPX:
http://www.rcsb.org/pdb/explore.do?structureId=1DPX

The model was created with VMD:
http://www.ks.uiuc.edu/Research/vmd/