The invention is a radioimmunoassay based on the Aα epitope which allows the evaluation of the potency of elastase inhibitors to inhibit {HEAD ~ formation} of cleavage products containing this neoepitope in a variety of {TAIL ~ in vitro cell biological situations} 
The invention is a radioimmunoassay based on the Aα epitope which allows the evaluation of the potency of elastase inhibitors to inhibit { HEAD ~ formation } of cleavage products containing this neoepitope in a variety of { TAIL ~ in vitro cell biological situations }
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