Carbohydrate-binding proteins occur widely in the plant kingdom. These proteins, commonly derived from seeds, are called phytohemagglutiuins or lectins (reviewed by Sharon and Lis’). It has become increasingly apparent that lectins can serve as probes for carbohydrate structure and function. The jack-bean lectin, namely, concanavalin A (con A), has received considerable attention because of its...

El efecto de formas técnicas o formuladas de profenofós en la fracción lipídica metabólica de hígado, cerebro y riñones así como la actividad de la glucosa-6-fosfato deshidrogenasa (G6PD) y 6-fosfogluconato deshidrogenasa (6PGD), que son consideradas enzimas relacionadas con los lípidos, fueron estudiadas. Ambas formas de profenofós fueron suministradas separadamente tanto por vía oral como cut...

Conantokin G (Con G), derived from the venom of Conus geographus, is the most characterized natural peptide antagonist targeted to N-methyl-D-aspartate (NMDA) receptors. Although Con G is known to bind to the glutamate binding site on the NR2 subunit of the receptor, it is unclear whether it can allosterically modulate the function of the receptor through the glycine binding site on the NR1 sub...

OBJECTIVE To explore the effects of maternal high-fat (HF) diet-induced obesity on fetal growth and the expression of placental nutrient transporters. METHODS Maternal obesity was established in rats by 8 weeks of pre-pregnancy fed HF diet, while rats in the control group were fed normal (CON) diet. Diet-induced obesity (DIO) rats and diet-induced obesity-resistant (DIR) rats were selected ac...

We have measured the association of platelet surface membrane proteins with Triton X-100 (Triton)-insoluble residues in platelets surface labeled with 125I. In both concanavalin A (Con A)-stimulated and resting platelets, this fraction is composed largely of polypeptides with apparent molecular weights of 45,000, 200,000, and 250,000 which comigrate with authentic actin, myosin heavy chain, and...

Rules are used as a programmingparadigm in several application domains, including active databases, planning, expert systems, and billing. For example, active databases have rules that execute upon the occurrence of particular events if speciied condition predicates are satissed. It is often the case that multiple rules are reable when a particular event occurs. We propose a declarative mechani...

Unlike adherens junctions, synapses are asymmetric connections, usually between axons and dendrites, that rely on various cell adhesion molecules for structural stability and function. Two cell types of adhesion molecules found at adherens junctions, cadherins and nectins, are thought to mediate homophilic interaction between neighboring cells. In this issue, Togashi et al. (see p. 141) demonst...

Previous de nitions of designated con rmer signatures in the literature are incomplete, and the proposed security de nitions fail to capture key security properties, such as unforgeability against malicious con rmers and non-transferability. We propose new de nitions. Previous schemes rely on the random oracle model or set-up assumptions, or are secure with respect to relaxed security de nition...

Onion Routing is an infrastructure for private communication over a public network. It provides anonymous connections that are strongly resistant to both eavesdropping and tra c analysis. Thus it hides not only the data being sent, but who is talking to whom. Onion Routing's anonymous connections are bidirectional and near real-time, and can be used anywhere a socket connection can be used. Pro...