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(A) 1H and (B) 1H-13C HSQC NMR spectra of L. vannamei F4, (C) 1H and (D) 1H-13C HSQC of L. vannamei F5. Major signals associated with CS and HS are indicated. Spectral integration was performed on the HSQC using labelled signals. Glucosamine, Glc; galactosamine, Gal; uronic acid, U; iduronic acid, I.
