Sugar chain purification and concentration method and sugar chain structure analysis method using sugar chain capture molecules

A substance capable of specifically interacting with a sugar chain is provided. The present invention provides a substance that can specifically interact with a sugar chain. Furthermore, the present invention relates to a method for separating, concentrating or purifying a sugar chain or a sugar chain-containing substance in a sample, comprising: a) capturing a sugar chain containing a substance capable of specifically interacting with a sugar chain in a fluid phase Contacting the carrier with the sample under conditions that allow the sugar chain-trapping carrier to react with the sugar chain or the sugar chain-containing substance; b) from the fluid phase, the sugar chain-trapping carrier and the sugar Removing the chain or the complex with the sugar chain-containing substance; and c) removing the complex from the sugar chain-trapping carrier and the sugar chain or the sugar chain-containing substance at least partially. Exposing to conditions. [Selection] Figure 1