The putative second messenger cyclic CMP immobilized on agarose by an aminoethylcarbamoyl spacer attached to the ribose 2'-position of the ligand. The gel can be used for affinity chromatography of cCMP-responsive proteins, such as protein kinases, phosphodiesterases and others. Detailed technical information available. Reference: Hammerschmidt et al., PLoS One 7(7): e39848 (2012). Normally all affinity gels are supplied in pre-packed columns. The free beads without a column are available upon request.