No, the protein doesn't need metal ion cofactors. J does your protein need metal ion cofactors? cz On 9/6/06, Carlo Zambonelli <zambonel at gmail.com> wrote: > -- View this message in context: http://www.nabble.com/Protein-solubility-tf2221840.html#a6241828 Sent from the Bio.net - Proteins forum at Nabble.com.