phosphoenolpyruvate carboxykinase (pepck) has been shown to be present in plants and animals, playing different metabolic roles in different tissues. the basic role of this enzyme is its contribution in the gluconeogenesis pathway. evidences have shown that pepck may play a role in metabolism of nitrogenous compounds in developing seeds of legumes. in this research, pepck gene expression and th...

I. The course of digestion of freeze-dried and heat-damaged egg albumen labelled with 14C in all its constituent amino acids was compared in germ-free and conventional chicks. The albumen was given at a level of 10 % in a test meal containing 28 % protein. Samples of digesta were taken 5 h later and analysed for 14C and nitrogenous constituents. 2. After administration of unheated albumen, II y...

In the past 12 years well over a hundred papers have appeared which have dealt with "audiogenic" seizures. None has succeeded in delineating the basic mechanism or mechanisms involved in these response patterns. Nonetheless, there is accumulating a solid body of data which clearly indicates that changes within the internal environment of the animal subject influence the frequency and severity w...

Seaweeds, as biofilters that remediate seawater eutrophication, have been widely applied in integrated cultivations for both ecological and economic benefits. Although Grateloupia turuturu (Rhodophyta) is considered a qualified species maricultivation, its growth biochemical performance under different nitrogen conditions are still unknown. Here, we cultured G. two sources (nitrate ammonium) at...

We examined the structural characteristics of a peptide Ag that determine its ability to interact with class II-MHC molecules and TCR. The studies reported here focused on recognition of the hen egg white lysozyme (HEL) tryptic fragment HEL(34-45) by two I-Ak-restricted T cell hybridomas. HEL(34-45) bound to I-Ak created more than one antigenic specificity. Experiments with truncated peptides a...

We revisit the problem of the electronic properties of a single strand of DNA, formulating the Hückel approximation for π-electrons in both the sugar-phosphate backbone chain and the π-stacking of nitrogenous bases in a single strand of DNA where the nitrogenous bases are adenine (A), guanine (G), cytosine (C) and thymine (T), respectively. We calculate the electronic band structure of π-electr...

Cheese ripening causes intense proteolysis, particularly when the cheese contains starter cultures. Several studies have shown presence of bioactive peptides in goat’s milk cheeses with antioxidant activity. Mexican goat cheeses’ peptide fractions were evaluated at different stages. Additionally, they correlated their Proteolysis was measured acid-soluble nitrogen and non-protein using reverse-...

To investigate the relationship between dietary nutrient concentration and weaning age on growth performance and caecal characteristics of rabbits, a trial was carried out on 64 litters (eight rabbits/litter) comparing two weaning ages (25 vs. 34 d) and two diets (HC: high concentrated and LC: low concentrated diet) offered to the kits from 18 to 34 d of age. At 34 d of age 54 animals per group...