Cu (I) #1412 Binds
1. SG 1204 of Cys82 at 2.006A
2. SG 1295 (Met90) at 3.111A - Not sure if this is too far, it lookes to put
the coordination in a tetrahedral complex
3. ND 1244 (His85) at 2.182A
4. ND 517 (HIS37) at 2.298A
It's from the Article in Biochemistry: High-Resolution
Solution Structure of Reduced Parsley Plastocyanin
Stefan Bagby, Paul C. Driscoll, Timothy S. Harvey, and H. Allen O. Hill
pp 6611 - 6622 Vol 33, 1994. Issue 21.