[Progress in study of self-assembling peptides].

Self-assembly of peptides is ubiquitous in the body of creatures. The molecules of peptides combine with each other to form proteins with different functions through self-assembly. The formation of a specific conformation of one type of protein is owing to the self-assembly of its compositive amino acids.

[The advance of bioactive peptide RGD in the research of bone regeneration].

Clinically, there has been so far no effective way to repair the bone-missing of large extent due to gash, infection and removal of tumor. The solution of this problem can be assisted by the addition of bioactive substances to substrate materials, because the growth of peripheral tissue and the fiber tissue growing the materials can be induced to the direction of bone-tissue by these biomaterials with bioactive peptides. The peptide Arg-Gly-Asp is the point between the integrin which comes from membrane and the ligand.

[Investigation of the degradation behavior of different modified bovine pericardial in vitro].

Bovine pericardium is mainly composed of collagen which has many good properties of extracellular matrix. This in vitro study was performed to quantitatively investigate and compare the degradation behavior of the bovine pericardial, which were modified with different methods. The purpose is to find out one method that presents not only the degradation regularity of material but also minimum antigenicity, so that bovine pericardium can be used as a well degradable guide tissue regeneration material.

[Research progresses of the synthesis and application of oligopeptide containing Arg-Gly-Asp sequence].

Arg-Gly-Asp (RGD) is one of the oligopeptides with biological activity found in recent years. It is the minimum ammonia serial on the ligand, which can be recognized by most of the integrins. It has important influence on the recognition of endothelial cell, anti-thrombus and anti-tumour function, and the therapy of burn and skin helcosis.

GENE DISPERSAL AND SPATIAL GENETIC STRUCTURE.

Spatial autocorrelation statistics have been studied in theoretical population genetic models and widely used in experimental studies of spatial structure in many plant and animal populations. However, the statistical properties of spatial autocorrelation statistics have remained uncharacterized. Little is known about how values of spatial autocorrelation statistics in population samples depend on the level of dispersal and scheme of sampling.