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Kuntaman Kuntaman
Laboratorium MIkrobiologi, Fakultas Kedokteran, Universitas Airlangga / SMF Mikrobiologi Klinik RSUD Dr. Soetomo SUrabaya
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology

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KEMAMPUAN TUMBUH Ecoli DH5 KOMPETEN DALAM 'MEDIUM MINIMAL' MENGANDUNG DEKSTRAN UNTUK MENGEMBANGKAN METODE SELEKSI KLON GEN DEKSTRANASE Afaf Baktir; Kuntaman Kuntaman
JURNAL PENELITIAN BIOLOGI BERKALA PENELITIAN HAYATI Vol 7 No 1 (2001): December 2001
Publisher : The East Java Biological Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23869/510

Abstract

Dextranase gene cloning so far have used selection method base on halo formation around he recombinant dex colony grown on LB – blue dextran agar plate. The difficulty of the cloning process is in the selection of dex positive clone. As an example, for obtaining dex gene it has been screened about 36500 colonies. The reason that it was difficult to determine Dex positive clone because dextran hydrolysis by primary recombinant E.coli cells in LB – blue dextran medium was too weak. In the present research, we have designed a minimal medium contained dextran and low concentration of yeast extract to reduce difficulty and to increase accuracy and reproducibility determining of recombinant dex E.coli.In this experiment, dex positive cloned was simulated by competent E.coli grown in medium contained dextranase. The minimal medium designed consist of dextran 1% + yeast extract 0.01% +KH2PO4 0.1% + MgSO4 0.24% + NaCl 0.1% + CaCl2 0.01%. this medium have proved can distinguish between recombinant E.coli dex and other E.coli ie. The competent E.coli can grow well in this medium which was supplied by dextranase, but without dextranase this competent E.coli did not or limited grow
Co-Authors AFAF BAKTIR