The present invention pertains to biodegradable polymers comprising a non-polymerizable lactone, biodegradable compositions comprising the polymer and a therapeutic agent the use of the compositions for the sustained release of therapeutic agents, wherein the therapeutic agent is reversibly immobilized on the polymer matrix using ionic complexation between the latent carboxylic groups present on the lactone bearing polymer matrix and a cationic group on the therapeutic agent.


< Angiotensin converting enzyme homolog and therapeutic and diagnostic uses therefor

< Gold implantation/deposition of biological samples for laser desorption three dimensional depth profiling of tissues

> Stabilized bioactive peptides and methods of identification, synthesis and use

> Method and composition for treating mammalian diseases and injuries which cause pain, erythema, swelling, crusting, ischemia scarring and excess white blood cell infiltration

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