“…Viruses were separated on cellulose powder {2151) and pearl-condensed agar {129), proteolipids on silicic acid {1286), and streptolysin on methylated albumin {2046) columns. Protein chromatography on thin layers of Sephadex {412, 499, 902, 1355, 1879), hydroxylapatite {984), and cellulose powder {511, 1879) has been described, as well as some experiments in PC {1304, 1387,1878).…”