sea urchin embryos were labeled with [ 3h ] adenosine at two developmental stages ( morula and prism ) and the labeled acid-soluble nucleotides were fractionated successively by column chromatography with deae-sephadex and deae-cellulose , and by thin-layer chromatography on a pei-cellulose plate .
C0011050
deae-cellulose
C0007648
cellulose