The mushroom Marasmius oreades lectin is a blood group type B agglutinin that recognizes the Galalpha 1,3Gal and Galalpha 1,3Galbeta 1,4GlcNAc porcine xenotransplantation epitopes with high affinity.

@article{Winter2002TheMM,
  title={The mushroom Marasmius oreades lectin is a blood group type B agglutinin that recognizes the Galalpha 1,3Gal and Galalpha 1,3Galbeta 1,4GlcNAc porcine xenotransplantation epitopes with high affinity.},
  author={Harry C. Winter and Kazem Mostafapour and Irwin J. Goldstein},
  journal={The Journal of biological chemistry},
  year={2002},
  volume={277 17},
  pages={14996-5001}
}
A blood group B-specific lectin from the mushroom Marasmius oreades (MOA) was investigated with respect to its molecular structure and carbohydrate binding properties. SDS-PAGE mass spectrometric analysis showed it to consist of an intact (H; 33 kDa) and truncated (L; 23 kDa) subunit in addition to a small polypeptide (P; 10 kDa). Isolation in the presence of EDTA produced only the H subunits, indicating that the latter two are formed by metalloprotease cleavage of the intact H subunit. Tryptic… CONTINUE READING
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