Precipitation by Metal Ions
In this type of precipitation, a metal ion will bind to a part of the protein.
An advantage of this type of precipitation is that they have great
precipitating power in a dilute solution. These ions can be classified into
three groups. Ions such as Mn2+, Fe2+, Co2+, Ni2+, Zn2+, and Cd2+ will bind
strongly to carboxylic acids and to nitrogenous compounds. Ca2+, Ba+2, Mg+2,
and Pb+2 will mainly bind to carboxylic acids. Finally, Ag+, Hg2+, and Pb2+
will bind strongly to sulphydryl groups.
If you want to go back to the main page click here
.