1962
Although glycans containing Gal beta 1 - 4Gal in these vertebrates were detected by precise structural analysis of the glycans using mass spectrometry and / or NMR spectrometry , there are no convenient methods to detect Gal beta 1 - 4Gal from various samples .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None