A, B, and H determinants

The human blood groups offer another example of how carbohydrates, in the form of glycohpids and glycoproteins, act as biochemical markers. The A, B, and O blood types are determined, respectively, by the A, B, and H determinants on the blood cell surface. (The odd naming of the type O determinant came about for complicated historical reasons.) Type AB blood cells have both A and B determinants. These determinants are the carbohydrate portions of the A, B, and H antigens. 

G. Schiffman, E. A. Kabat, and W. Thompson, Immunochemical studies on blood groups. XXXn. Immunochemical properties of and possible partial structures for the blood group A, B, and H antigenic determinants, Biochem. J., 3 (1964) 587-593. 

As with the trisaccharides, the tetrasaccharides are classified according to whether they have linear or branched structures, and then by the nature of the sugar at the reducing terminL The A, B and H (type 3) human blood group determinant tetrasaccharides have been prepared and converted into polyacrylamide conjugates. ... 

For infinitely large chains a = 0 and h + c = R. Coefficients b and c can be separated, R value being determined in any experimental point. One can use the expression containing a greater number of terms in the expansion if required. Consequently the number of experimental determinations of coefficients will grow. 

Cormie, A.B., Schwartz, H.P., Gray, J. (1994b). Determination of the hydrogen isotopic composition of bone collagen and correction for hydrogen exchange. Geochimica et Cosmochimica Acta, Vol. 58, pp. 365-375. 

Fig. 2. Temperature dependence of the HS fraction % according to the Ising model. The employed parameter values are = 150 K, Aj = Aj = 500 cm and X = — 100 em h Here, Aj and Aj are the orbital energy differences between the and levels and between the Bj and levels, respectively, X being the spin-orbit coupling constant. The model parameters A, Aj, and X determine the value of AG. The levels result from the HS iron(II) ground state in orthorhombic symmetry according to Bj -1- B2 + B. The figures on the curves specify the values of...

Another approach widely used for nonadiabatic reactions is the diabatic one. The channel Hamiltonians Hex and H determining the zeroth-order Born-Oppenheimer electron states of the donor A and acceptor B and the perturbations Vt and Vf leading to the forward and reverse electron transitions, respectively, are separated... 

Three new alkaloids, euthyroideones A, B and C (11-13) were isolated from the New Zealand bryozoan Euthyroides episcopalis [38]. All three compounds contain the unique heterocyclic pyrido(4,3-h)-l,4-benzothiazine skeleton. The structure of euthyroideone A (11) was determined by X-ray crystallography, NMR spectroscopy and mass spectrometry. Euthyroideone B (12) exhibited modest cytotoxicity against the BSC-1 cell line [38],... 

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