Soybeans [Glycine max (L.) Merr .] contain at least four glycoproteins that are capable of clumping red blood cells (Catsimpoolas and Meyer, 1969; Lis et al. 1966 ; Rackis et al. 1959; Stead et al. 1966). These glycoproteins are called lectins. The lectin content in defatted soybean meal is about 3% (Liener and Rose, 1953). The major lectin in soybean seed, termed soybean lectin (SBL), has a molecular weight of 120,000 and specificity for D-galactose and N-acetyl-D-galactosamine (Bhuvaneswari et al. 1977; Lotan et al. 1974).
Pull, S. P.; Pueppke, S. G.; Hymowitz, T.; and Orf, J. H.
"Research notes: Screening soybean seed for lectin content,"
Soybean Genetics Newsletter: Vol. 5
, Article 23.
Available at: http://lib.dr.iastate.edu/soybeangenetics/vol5/iss1/23