PT  - JOURNAL ARTICLE
AU  - Romans, D G
AU  - Tilley, C A
AU  - Dorrington, K J
TI  - Monogamous bivalency of IgG antibodies. I. Deficiency of branched ABHI-active oligosaccharide chains on red cells of infants causes the weak antiglobulin reactions in hemolytic disease of the newborn due to ABO incompatibility.
DP  - 1980 Jun 01
TA  - The Journal of Immunology
PG  - 2807--2811
VI  - 124
IP  - 6
4099  - http://www.jimmunol.org/content/124/6/2807.short
4100  - http://www.jimmunol.org/content/124/6/2807.full
SO  - J. Immunol.1980 Jun 01; 124
AB  - This study shows that monogamous bivalency of human IgG anti-A and anti-B is necessary to maintain sensitization of red cells in the antiglobulin test. On red cells of infants and of adults of i phenotype, the known deficiency of branched ABHI-active oligosaccharide chains limits monogamous bivalency, and these accounts for the relatively weak direct antiglobulin reactions in hemolytic disease of the newborn due to ABO incompatbility. One corollary of this finding is that there is strong biologic selection against the transition on fetal red cells from the straight-chain i phenotype to branched-chain I phenotype, since such branching of cell-surface oligosaccharide chains would compromise ABO-incompatible pregnancies.