Structural and property characterization of corn starch modified by cyclodextrin glycosyltransferase and specific cyclodextrinase

Abstract Enzymatic modification is generally applied to enhance desirable attributes of starch. In this study, β-cyclodextrin glycosyltransferase (β-CGTase) together with a specific cyclodextrinase (CDase) was used to modify corn starch. For single β-CGTase treatment, the molecular weight (Mw) was reduced to 36.7 × 105 g/mol and 7.7 × 105 g/mol for 1 h and 6 h reaction, and the debranched samples had a high proportion of chains with degree of polymerization (DP)