Lectin-binding substance measurement method, lectin-binding substance measurement kit, and capture carrier for use in these

A lectin-binding substance measurement method for measuring a lectin-binding substance in a sample, the method comprising:

• purifying the lectin-binding substance by steps including at least
• a capturing step of bringing a capture carrier including a water-insoluble carrier and a molecule immobilized on the water-insoluble carrier, the molecule being a molecule capable of capturing a lectin-binding substance, into contact with the sample to cause the capture carrier to capture the lectin-binding substance;
• a washing step of removing contaminants unbound to the capture carrier;
• and
• a releasing step of releasing the lectin-binding substance from the capture carrier to obtain a prepared sample;
• and
• measuring the purified lectin-binding substance in the prepared sample by using a lectin, wherein
• the lectin is at least one of
• a labeled lectin including a labeling substance and a lectin, and
• a blocked labeled lectin including a water-soluble carrier made of a first water-soluble polymer, a labeling substance and a lectin immobilized on the water-soluble carrier,
• the lectin-binding substance is a substance having a glycan capable of binding to a lectin,
• the molecule capable of capturing the lectin-binding substance is a molecule capable of recognizing and binding to a portion other than the glycan portion in the lectin-binding substance, and
• the capture carrier does not include the labeling substance.