This paper studies a transboundary pollution problem between two neighbour regions as a dynamic game. These two regions do not only share an environmental problem but they are also engaged in interregional trade. A good produced in one region is traded to the other which uses it as an input. This intermediate good is supplied by the former and demanded by the latter. The supply-demand scheme determines the price and production of the intermediate good. Thus total production is fixed in both regions, and the emissions of pollutants are also determined as a by-product. Cooperation cuts down production and trade, and in consequence the emissions of pollutants. Therefore, the environmental gain from cooperation overcomes the shrink in the interregional trade. An allocation mechanism to share the surplus of cooperation is defined, which guarantees a time-consistent agreement between both regions.

Heparin solubilizes asymmetric acetylcholinesterase, from chick skeletal muscle and retina, as a 24 S complex which is quantitatively converted to conventional asymmetric molecular forms of the enzyme (A,, and As, either class I or class II) upon exposure to high salt. The simultaneous presence of salt and heparin in the homogenization medium selectively prevents, however, the release of class II A-forms in both muscle and retina. Heparin may generally act by displacing native proteoglycans involved in the attachment of the enzyme tail to the extracellular matrix, or its neural equivalent, being in turn removed by salt to yield typical asymmetric enzyme forms. Heparin would also appear to displace some other molecules specifically involved in the EDTA-sensitive attachment of class II tailed forms, this effect being antagonized by salt.Acetylcholinesterase Heparin EDTA

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