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Florescence Microscopy
 
The following composite images were produced by superimposing a bright-field image with an YFP-filtered image.
 
 
 
 
 
 
[[File:Fluorescence_negative_control.PNG|600px|thumb|left|Figure 1, Panel A]]
 
Figure 1, Panel A; a composite fluorescence image – brightfield micrograph of a pSB1A3-transformed liquid cell culture (negative control) exhibiting no fluorescence as expected.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
[[File:K523013 positive control.PNG|600px|thumb|left|Figure 1, Panel B]]
 
Figure 1, Panel B; a composite fluorescence image – brightfield micrograph of a K523013-transformed liquid cell culture exhibiting yellow fluorescence as expected.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
[[File:K1352004 YFP fluorescence.PNG|600px|thumb|left|Figure 1, Panel C]]
 
Figure 1, Panel C; a composite fluorescence image – brightfield micrograph of a K1352004-transformed liquid cell culture exhibiting yellow fluorescence.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Confirmation of K1352004 DNA construct and the insertion of a MCS
 
 
[[File:K1352004, K523013, INP-YFP-His digest gel.png|600px|thumb|left|Figure 2]]
 
Figure 2; a restriction digest verification of plasmids K1352004, K523013, and “INP-YFP-His” (a previously created plasmid which identical to K1352004 except that the FLAG tag is a 6xHis tag)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
For figure 2: L stands for 10,000bp – 500bp DNA marker “ladder”, and the numbers indicate the following:
 
 
1. INP-YFP-His plasmid undigested
 
 
2. INP-YFP-His plasmid digested with XbaI
 
 
3. INP-YFP-His plasmid digested with XbaI and HindIII
 
 
4. INP-YFP-His plasmid digested with XbaI and BglII
 
 
5. K523013 plasmid undigested
 
 
6. K523013 plasmid digested with XbaI
 
 
7. K523013 plasmid digested with XbaI and HindIII
 
 
8. K523013 plasmid digested with XbaI and BglII
 
 
9. K1352004 plasmid undigested
 
 
10. K1352004 plasmid digested with XbaI
 
 
11. K1352004 plasmid digested with XbaI and HindIII
 
 
12. K1352004 plasmid digested with XbaI and BglII
 
 
 
[[File:K1352004 standard digest.png|600px|thumb|left|Figure 3]]
 
Figure 3; a restriction digest verification of plasmid K1352004
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
For figure 3: the letters indicate the following:
 
 
L. 10,000bp – 500bp DNA marker “ladder”
 
 
N. K1352004 plasmid digested with no enzymes
 
 
E. K1352004 plasmid digested with EcoRI
 
 
X. K1352004 plasmid digested with XbaI
 
 
S. K1352004 plasmid digested with SpeI
 
 
P. K1352004 plasmid digested with PstI
 
 
EP. K1352004 plasmid digested with EcoRI and PstI
 
 
XS. K1352004 plasmid digested with XbaI and Spe1
 
 
Western Blot to confirm the presence and size of the translated INP-YFP-FLAG protein
 
 
[[File:Western blot K1352004.png|600px|thumb|left|Figure 4]]
 
Figure 4,
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
For figure 4 nitrocellulose paper, from left-to-right the lanes are:
 
 
1. Induced (with IPTG) K1352004 lysate probed with anti-FLAG antibody #1
 
 
2. Induced (with IPTG) K1352004 lysate probed with anti-FLAG antibody #2
 
 
3. Induced (with IPTG) Ag43-FLAG lysate probed with anti-FLAG antibody #1
 
 
4. Induced (with IPTG) Ag43-FLAG lysate probed with anti-FLAG antibody #2
 
 
5. Induced (with IPTG) Ag43-FLAG lysate probed with anti-FLAG antibody #3
 
 
6. Induced (with IPTG) Ag43-FLAG lysate probed with anti-FLAG antibody #4
 
 
7. Protein marker “ladder”
 
 
DNA Sequencing
 
The recombinant plasmid was Sanger-sequenced with the following sequencing primers.  “G101” is a reverse primer, the rest are forward primers.
 
 
“G101” (attaccgcctttgagtgagc)
 
 
“G100” (tgccacctgacgtctaagaa)
 
 
“35 INP-SEQ 1” (ccgattcattaatgcagctgg)
 
 
“36 INP-SEQ 2” (gaggttgctgttgccgac)
 
 
“37 INP-SEQ 3” (ggtgtggaagccgacattc)
 
 
The plasmid insert was found to be exactly as desired.  Highlighted below is the MCS excerpt from the “G101” primer results (“G101” is a reverse primer which is why the sequence is in reverse complement).
 
 
[[File:MCS in INP-YFP-FLAG.JPG|600px|thumb|left|Figure 5]]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Conclusions
 
The construct sequence was produced exactly as designed; the full FLAG-tag – with BglII and HindIII sites – is present at the N-terminus of YFP.  However, despite all this, possibly due to YFP’s C and N termini being on the same side of it, the FLAG-tag is not accessible to antibodies.
 

Latest revision as of 18:58, 13 October 2014

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