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During the last few years, incredible efforts have been dedicated to the regioselective modification of these biopolymers paving the way for improved properties and tailored activities. Herein, the most recent advances in chitin\/chitosan regioselective modification, reaction conditions, selectivity, and the impact on its applications are highlighted. Moreover, the recent focus on chitooligosaccharides, their regioselective and chemoselective functionalization, as well as their role in biological studies, including molecular recognition with several biological targets are also covered.<\/jats:p>","DOI":"10.1002\/asia.201601041","type":"journal-article","created":{"date-parts":[[2016,10,13]],"date-time":"2016-10-13T08:08:45Z","timestamp":1476346125000},"page":"3468-3481","source":"Crossref","is-referenced-by-count":38,"title":["Selective Modification of Chitin and Chitosan: En Route to Tailored Oligosaccharides"],"prefix":"10.1002","volume":"11","author":[{"given":"Lu\u00edsa C. 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