CP® PEI Cellulose TLC Plate coated with a complex of cellulose and poly- ethyleneimine anion exchange layers, it is suitable for the separation of substances with exchange-active groups, such as amino acids, peptides, enzymes, nucleic acid constituents (nucleotides, nucleosides) and analysis of mutagenic substances with a 32P postlabelling procedure.

source: http://www.creative-proteomics.com/products/cp-pei-cellulose-tlc-plate-207.htm