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Amino acid analysis of selected reversed-phase high performance liquid chromatographic peaks of crude and partially purified lysed human leukocyte ultrafiltrate.

Analytic reversed-phase high performance liquid chromatography (RP-HPLC) was performed to separate from the crude lysed human leukocyte ultrafiltrate (LLU) its partially purified most immunoactive subfraction P2/II in vivo. Under conditions used, the highest degree of segregation of both. LLU and P2/II could be observed in the first, as well as in the last two fifth of the water-methanol gradient. The comparison of the RP-HPLC traces of LLU and P2/II suggests that probably some hydrophilic components of LLU have been removed or--at least--diminished. The preliminary amino acid analysis (AA) of the selected peaks showed that none of them lacks Gly, Ser, and Glu. Of the basic amino acid residues Lys has been found with relatively many peaks while hydrophobic as well as aromatic amino acids have been represented very modestly. Further study is warranted in order to determine better the bearings of presented findings for the in vivo situation.