The Lewis blood group system comprises two main carbohydrate antigens, Le(a) and Le(b). Lewis typing has traditionally been based on serologic determinations using erythrocytes and saliva. Several recent studies have demonstrated that erythrocyte Lewis phenotype may change during pregnancy or disease, and inappropriate Lewis antigens have been found in both normal and neoplastic tissue. To eval...

Bis- and tris-Lewis acids, based on alkynylsilanes with terminal boron functions, were prepared tested for their ability to accept neutral Lewis base molecules.

The legacy of Gilbert Newton Lewis (1875-1946) pervades the lexicon of chemical bonding and reactivity. The power of his concept of donor-acceptor bonding is evident in the eponymous foundations of electron-pair acceptors (Lewis acids) and donors (Lewis bases). Lewis recognized that acids are not restricted to those substances that contain hydrogen (Brønsted acids), and helped overthrow the "mo...

We have shown previously that the mucins of the human pancreatic cancer cell line, SW1990, have both sialyl-Lewis(a) and sialyl-Lewis(x) carbohydrate ligands that are implicated in tumor cell metastasis. In the present study, we undertook to identify the protein core of these mucins. SW1990 mucins that carry sialyl-Lewis(a) and sialyl-Lewis(x) bound to the MUC1 peptide-specific mAb 139H2. Remov...

©AsiaPacific MediaEducator Issue No.11 July Dec. 2001 T paper discusses some fundamental assumptions about pluralism in the Australian print media. Pluralism, the number of print media outlets available to the public, and known as structural diversity, can be considered as one of two elements of media diversity. The other is the variety of views presented by those outlets, known as content dive...

Background: Considering the role of Duffy antigenic system expression on RBCs as chemokines for inflammatory cytokines, expression of Duffy antigens as different phenotypes was studied in a group of patients with SLE. The association between different phenotypes of Duffy antigens and occurrence of SLE and its severity was assessed.  Methods: This cross-sectional study was carried out on 100 pa...