A strategy of evolutionary studies that can compare vast numbers of genome sequences is becoming increasingly important with the remarkable progress of high-throughput DNA sequencing methods. We previously established a sequence alignment-free clustering method "BLSOM" for di-, tri-, and tetranucleotide compositions in genome sequences, which can characterize sequence characteristics (genome si...

The proteins in the hinge ligaments of molluscan bivalves were subjected to chemotaxonomic studies according to their amino acid compositions. The hinge-ligament protein is a new class of structure proteins, and this is the first attempt to introduce chemical taxonomy into the systematics of bivalves. The hinge-ligament proteins from morphologically close species, namely mactra (superfamily Mac...

Because natural organisms are a part of the factors constituting the ecosystem for each organism, it is important to clarify both physical and biological exploitable factors to determine species compositions which exist in that ecosystem. The variation in factors which constitute an ecosystem makes up the variation in species composition. At the same time, each species will interact and will ma...

Aims: The gut microbiota of avian species, especially wild birds, is studied less than that mammals. Moreover, due to ethical concerns, a vast majority studies have been limited their feces. In this study, we investigated the microbial composition in upper intestinal tract sympatric, heterospecific bird species.
 Study Design: We obtained samples from three species belonging same Order Pas...

Pumpkins have considerable variation in nutrient contents depending on the cultivation environment, species, or part. In this study, the general chemical compositions and some bioactive components, such as tocopherols, carotenoids, and β-sitosterol, were analyzed in three major species of pumpkin (Cucurbitaceae pepo, C. moschata, and C. maxima) grown in Korea and also in three parts (peel, fles...