Recovery in E.coli and
retransfection in P.falciparum of SRF plasmids.
(A) Ethidium bromide-stained agarose gel showing
plasmid DNA prepared from individual E.coli colonies
obtained following transformation with DpnI-treated
SRF gDNA and digested with a combination of BamHI
and EcoRI. The pΔMSP1#2 parent
plasmid is included (parent). DNA markers in kb (M) are indicated
to the left. (B) PFGE of recSRF chromosomes obtained
from retransfection of an E.coli recovered SFR
plasmid pool. Lane 1, parental D10; lane 2, URF; lane 3, recSRF;
lane 4, SRF. (C) recSRF chromosomes were digested
at 25°C overnight with varying units
of SmaI: lane 1, 0 U; lane 2, 0.01 U; lane 3, 0.1
U; lane 4, 1 U; lane 5, 2 U; lane 6, 3 U. The DNA was transferred
to a nitrocellulose membrane and hybridised with the MSP-1 probe.