Human cells allosensitized in vitro release soluble suppressor factors: presence of at least two distinct factors.

Abstract

Human cells allosensitized in vitro release suppressor "factors" (SF) capable of inhibiting a primary mixed lymphocyte reaction (MLR). Preincubation experiments with SF of either responders or stimulators in MLR suggested the presence of at least two distinct suppressor activities: one called SFR, acting on certain responders including the SF producer; the… (More)

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