Crystallographic refinement of ricin to 2.5 A.
Rutenber, E., Katzin, B.J., Ernst, S., Collins, E.J., Mlsna, D., Ready, M.P., Robertus, J.D.(1991) Proteins 10: 240-250
- PubMed: 1881880 
- DOI: 10.1002/prot.340100308
- Primary Citation of Related Structures:  
2AAI - PubMed Abstract: 
The plant cytotoxin ricin consists of two disulfide-linked chains, each of about 30,000 daltons. An initial model based on a 2.8 A MIR electron density map has been refined against 2.5 A data using rounds of hand rebuilding coupled with either a restrained least squares algorithm or molecular dynamics (XPLOR) ...