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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
MALDI-TOF mass spectrometry profile of the chitosan oligosaccharide (COS) prepared from the chitosan hydrolysis process catalyzed by Paenibacillus sp. TKU047 chitosanase.