SPECIFIC INHIBITION OF REGENERATION IN CLYMENELLA TORQUATA

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Abstract
1. Evidence is presented suggesting the presence of specific head-and tailinhibitors, and of even more specific dorsal-ventral intra-organ tail-inhibitors. 2. The tail-inhibitor is shown to be distributed along a posterior-to-anterior gradient. 3. Another substance, a "somatic factor," is postulated as existing along an anterior-to-posterior gradient. 4. The electrophoretic mobilities of the head-and tail-inhibitors at sea water pH are demonstrated. 5. The possibility of bioelectric control of the movements and concentrations of growth- and pattern-specific substances is briefly considered.

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