[Analysis of immunoregulatory peptides of the thymus using high performance liquid chromatography]

High performance liquid chromatography (gel filtration and chromatography in the reverse phase) was applied to analyse a composition of the heterogenous immunoregulating peptide preparation T-activine isolated from calf thymus. Gel chromatography at high pressure on the column TSK G2000 SW enabled to separate T-activine into 3 subfractions at a preparative scale. Physico-chemical properties and biological activity of these fractions were studied in vitro. Subfraction B with molecular mass of 1.0-3.5 kD and pI below 5.9 proved to be the most active.