[ccp4bb] PDB ligand 3-letter code for TCEP?

[Alex Lee]

Hi All,

I tried to look for the 3-letter ligand for reducing reagent TCEP in PDB
but I could not find one.  I even search with
"Tris(2-carboxyethyl)phosphine hydrochloride" in PDB but got right hit. How
do I need to to to pull the TCEP code out?