摘要:
Probes obtained by extracting DNAs carried by Klebsiella pneumoniae, completely digesting the extracted DNAs with a restriction enzyme HindIII, cloning the same into an appropriate vector and then screening probes containing the DNA fragments inherently carried by K. pneumoniae, followed by the clarification of the base sequences of these probes.
摘要:
Beschrieben werden neue Mikroorganismen, die befähigt sind a-Aminocarbonsäureamide, in Form des Racemats oder seiner optisch aktiven Isomere, der allgemeinen Formel worin A zusammen mit -NH- und -CH- einen gegebenenfalls substituierten 5- oder 6-gliedrigen gesättigten heterocyclischen Ring bedeutet, als einzige Stickstoffquelle zu verwerten und (RS)-a-Aminocarbonsäureamide der bereits definierten Formel I in eine S-a-Aminocarbonsäure der allgemeinen Formel worin A die genannte Bedeutung hat, zu überführen.
摘要:
Recombinant host cells are obtained that comprise (A) a heterologous, polypeptide-encoding polynucleotide segment, stably integrated into a chromosome, which is under transcriptional control of an endogenous promoter and (B) a mutation that effects increased expression of the heterologous segment, resulting in enhanced production by the host cells of each polypeptide encoded by that segment, relative to production of each polypeptide by the host cells in the absence of the mutation. The increased expression thus achieved is retained in the absence of conditions that select for cells displaying such increased expression. When the integrated segment comprises, for example, ethanol-production genes from an efficient ethanol producer like Zymomonas mobilis, recombinant Escherichia coli and other enteric bacterial cells within the present invention are capable of converting a wide range of biomass-derived sugars efficiently to ethanol.