. 2005 Oct 10;391(Pt 2):167–175. doi: 10.1042/BJ20050093

Table 1. Liquid-state ¹³C-NMR chemical-shift (δ) values (p.p.m.) of native chitosan and chito-oligomeric/monomeric mixture obtained using papain and Pronase.

	δ (p.p.m.)
Sample	–C=O	C1	C4	C5	C3	C6	C2	–CH₃
Chitosan	181.21	98.19	77.21	75.42	70.65	60.69	58.47	24.58
Chito-oligomeric/monomeric mixture
Papain	177.15	98.14	77.26	75.41	70.71	60.78	56.46	23.01
Pronase	178.48	102.1	79.26	77.84	72.64	62.18	58.98	24.00

Table 1. Liquid-state 13C-NMR chemical-shift (δ) values (p.p.m.) of native chitosan and chito-oligomeric/monomeric mixture obtained using papain and Pronase.