Low density Zinc-Iminodiacetic acid (IDA) crosslinked agarose resin. The lower amount of available groups allows for higher selectivity/specificity in the binding of the tagged-protein. It recognizes two exposed histidine tags in vicinal position and is recommended for purification of proteins difficult to separate. Suitable for batch or column purifications. Binding/loading capacity: 5 - 20 μmol Me2+/ml gel.