RECOGNITION OF ALTERED PATTERNS OF MESSENGER RNA SYNTHESIS IN A MOUSE HEPATOMA.
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An apparatus is described that reduces the time required for counter-current distribution in aqueous polymer two-phase systems by a factor of more than five. Phase settling, which has been the time consuming step, is here facilitated by centrifugation. The crucial point in the construction, that allows automatization, is that the transfer step in the counter-current distribution cycle is performed during centrifugation.
The presence of two red cell populations in young chicks has been demonstrated after increasing the settling time used during counter-current distribution with charged 5% Dextran--4% poly(ethylene glycol) two-phase systems. A Fortran program using statistical methods was applied to show the resolution in two peaks (with two or three subpopulations assumed) of the counter-current distribution curves.
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