AB5 toxins are composed of an enzymatic A subunit that disrupts cellular function associated with a pentameric B subunit required for host cell invasion. EcxAB is an AB5 toxin isolated from clinical strains of Escherichia coli classified as part of the cholera family due to B subunit homology. Cholera-group toxins have catalytic ADP-ribosyltransferases as their A subunits, so it was surprising ...

In this note we show that a Noetherian module has a dual module if and only if it satisfies AB5*. A connection between completeness and AB5* is also established. In this note we relate completeness, quasi-completeness, the A B5* condition, and duality. The main result is that a Noetherian R-module has a dual module if and only if it satisfies A B5*. Throughout this note R will denote a commutat...

Representatives of two species, the chicken and the goat, were immunized by injection with Freund's adjuvant, of specific precipitates prepared from the antisera of rabbits with various allotypic specificities. The precipitation reactions of the resulting antisera with normal rabbit sera were studied in liquid and in gellified media. In these reactions the isotypic specificity and often one or ...

Any category A can be embedded in its right completion A. When A is small and abelian, this completion A is AB5 and the embedding is exact.

ABy compounds with superlattice structures are considered as new generation materials for hydrogen storage and very promising negative electrode Ni-MH batteries. These can be the stacking of two fundamental layers along c crystallographic axis: [A2B4] [AB5]. Binary RNix (R = rare earths) adopting absorb large quantity but show poor reversibility. The built by constraining ab planes subunit to t...

The main aim of this paper is to show that an AB5 module whose small submodules have Krull dimension has a radical having Krull dimension. The proof uses the notion of dual Goldie dimension.

For a certain family of complete modular lattices, we prove Jordan--H\"older--Scheier-like" theorem with no assumptions on cardinality or well-orderedness. This includes both lattices which are join- and meet-continuous, as well the subobjects any object in an abelian category satisfying properties related to Grothendieck's axioms (AB5) (AB5*). We then give several examples objects categories s...