摘要:
This present invention provides a vector for expression and secretion of a polypeptide by directly joining a DNA sequence coding for a signal peptide to a DNA sequence coding for the desired polypeptide, the vector containing the DNA sequence coding for the signal peptide, a vector for expression and secretion of the desired polypeptide as defined above and further having incorporated therein the DNA sequence coding for the desired polypeptide, a microorganism transformed by the secretion vector, and a process for producing the desired polypeptide by growing the microorganism.
摘要:
Disclosed are compositions such as foods and pharmaceuticals, and methods of their production, comprising at least one lactic acid bacterium capable of assisting in intestinal regulation and preventing dental caries. The bacterium is an isolated living Streptococcus salivarius strain identified as FERM BP-3885 and is further capable of producing dextranase while persisting in the oral cavity.
摘要:
Disclosed is the isolation and cloning of genes encoding glucanohydrolase enzymes and the expression and secretion of exogenous glucanase gene products in host cells.
摘要:
A nacrein protein is expressed by separating a protein fraction having a molecular weight of sixty thousand, as determined by SDS-PAGE, from pearl proteins extracted from the nacreous layers of pearl oysters, synthesizing a probe coding for the N-terminal amino acid sequence of the protein in this fraction, cloning the cDNA derived from the mRNA of the mantle of the pearl oyster and hybridizable with the synthesized probe, and introducing the cloned cDNA into the host cells of Escherichia coli.
摘要:
Disclosed is the isolation and cloning of genes encoding glucanohydrolase enzymes and the expression and secretion of exogenous glucanase gene products in host cells.