Abstract

1. 1. During systemic acute inflammatory reaction caused in chicks by intestinal injury or i.p. actinomycin D administration, the production of a biotin-binding egg white protein (avidin) was induced in various tissues. Local muscular burning injury induced avidin production only in the injured area. 2. 2. Avidin production in the injured tissues was induced in 6 hr, and avidin concentrations assayed by the [ 14C]biotin-binding method and radioimmunoassay were maximal at 24 hr. In a few days, avidin had disappeared from the tissues. 3. 3. Avidin induction in the injured muscle was transferred into the in vitro incubation from 4 hr after injury. Protein and RNA synthesis was needed for avidin production in vitro, and new avidin molecules were synthesized during the incubation.

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