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Table 2 13C-NMR chemical shift of methylated agarose from G. asiatica and agarose from G. asiatica, Biowest, and Sigma

From: Modification and comparison of three Gracilaria spp. agarose with methylation for promotion of its gelling properties

Agarose Unit 13C chemical shifts (ppm)
C1 C2 C3 C4 C5 C6 –OCH3
G. asiatica G 102.45 70.28 82.25 68.79 75.42 61.45
A 98.38 69.88 80.14 77.41 75.66 69.66
G. asiatica (methylated) G 102.58 70.40 82.38 68.91 75.51 61.57 59.38, 56.01
A 98.46 70.02 80.27 77.51 75.79 69.57
Biowest G 102.46 70.29 82.26 68.79 75.42 61.46
A 98.38 69.88 80.15 77.41 75.66 69.45
Sigma G 102.23 70.00 81.96 68.49 75.10 61.16
A 97.92 69.75 79.91 77.03 75.40 69.14