Spider feeding behaviour optimises dietary essential amino acid composition (reply)

Analysis of repetitive amino acid motifs reveals the essential features of spider dragline silk proteins

The extraordinary mechanical properties of spider dragline silk are dependent on the highly repetitive sequences of the component proteins, major ampullate spidroin 1 and 2 (MaSp2 and MaSp2). MaSp sequences are dominated by repetitive modules composed of short amino acid motifs; however, the patterns of motif conservation through evolution and their relevance to silk characteristics are not wel...

Effects of Dietary Essential Amino Acid Concentrations on the Spawning Performance of Yellowfin Sea Bream, Acanthopagrus latus

A study was conducted to investigate the effects of dietary essential amino acid (EAA) concentrations on the spawning performance of Acanthopagrus latus. Broodstocks were fed with three replicates of isonitrogenous and isolipid formulated diets (diet 1, diet 2 and diet 3) with different concentrations of EAA (15.40, 16.88 and 18.14%, respectively) for 138 days. Results showed relative fecundity...

Dietary Formulation with Poultry by-Product Meal on a Total Amino Acid vs. a Digestible Amino Acid Basis

Previous results indicated that performance of chicks fed a high level (10%) of poultry by-product meal(PBM) was lower than performance of chicks fed a corn-soybean meal (SBM) diet. The latter difference was hypothesized to be due to variation in digestible amino acid (AA) levels among the diets. This study evaluated diets containing PBM formulated on equivalent total AA basis vs. an equivalent...

Dietary induction of some enzymes of amino acid metabolism during 2-acetylaminofluorene feeding.

Essential Amino Acid Supplementation by Gut Microbes of a Wood-Feeding Cerambycid.

Insects are unable to synthesize essential amino acids (EAAs) de novo, thus rely on dietary or symbiotic sources for them. Wood is a poor resource of nitrogen in general, and EAAs in particular. In this study, we investigated whether gut microbiota of the Asian longhorned beetle, Anoplophora glabripennis (Motschulsky), a cerambycid that feeds in the heartwood of healthy host trees, serve as sou...