Team:PennState/diauxie/progress

Each test construct (promoter + GFP) was cloned into the pSB1A2 plasmid and transformed into several E. coli strains: DH5α, W3110 ∆xylB-G, and W3110 ∆xylB-R. Preliminary induction studies were run to find the optimal induction time and to analyze the linear range for OD versus fluorescence.

Test Construct

Tests were then run to compare the levels of induction with various mixes of xylose, glucose and xylose+glucose. The goal was to obtain a noticeably higher level of induction with the xylose/glucose mixture when compared to the wild-type construct.

"Smart Fold" Pthalate Biosensor

DH5a fluoresence

"Nuclear Fusion" BPA Biosensor

W3110 fluoresence

These graphs show the normalized fluoresence strength for PN, P1, and P3 xylose promoters induced with xylose, glucose, and a mixture. The W3110 cells have xylE and xylG knocked out while DH5α still contain the natural xylose transport and metabolim. This data shows that there is little effect on the fluorescence intensity using strains with xylE and xylG sequences deleted. Our next step is to transform these promoters into E. coli cells with deleted xylose metabolism and transporters.

"Smart Fold" Pthalate Biosensor

PN induction time

"Nuclear Fusion" BPA Biosensor

P1 induction time

"Nuclear Fusion" BPA Biosensor

P3 induction time

The cells were induced iduced with sugars and then allowed to grow with sample being removed every half hour. The goal was to find the induction time where fluorescence starts to level off. The intensity has leveled off and begins to drop after 7.5 hours so this was the growth time for all future tests.

"Smart Fold" Pthalate Biosensor

PN linear range

"Nuclear Fusion" BPA Biosensor

P1 linear range

"Nuclear Fusion" BPA Biosensor

P3 linear range

The three promoters analyzed show linear behavior in the optical density range. The strength of fluorescence did change depending on the promoter. With this information we were able to accurately normalize fluorescence data.

@@ Line 191: / Line 191: @@
 <p>Tests were then run to compare the levels of induction with various mixes of xylose, glucose and xylose+glucose.  The goal was to obtain a noticeably higher level of induction with the xylose/glucose mixture when compared to the wild-type construct.</p>
+<table> <!-- this table separates content into column-like quadrants -->
+        <tr>
+          <td style="padding-top:30px; padding-right:30px" valign="top" width="45%"><h4>"Smart Fold" Pthalate Biosensor</h4>
+            <hr />
 </div>
 <div id="psugallery" style="float: right; clear: right; width: 500px;">
@@ Line 197: / Line 202: @@
    <div class="gallerytext"><p>DH5a fluoresence</p></div>
   </div>
+</td>
+<td style="padding-top:30px; padding-right:30px" valign="top" width="45%"><h4>"Nuclear Fusion" BPA Biosensor</h4>
+            <hr />
 </div>
 <div id="psugallery" style="float: right; clear: right; width: 500px;">
@@ Line 204: / Line 213: @@
    <div class="gallerytext"><p>W3110 fluoresence</p></div>
   </div>
+</p></td>
+ </tr>
+</table>
 <p>These graphs show the normalized fluoresence strength for PN, P1, and P3 xylose promoters induced with xylose, glucose, and a mixture.  The W3110 cells have <em>xylE</em> and <em>xylG</em> knocked out while DH5α still contain the natural xylose transport and metabolim.  This data shows that there is little effect on the fluorescence intensity using strains with <em>xylE</em> and <em>xylG</em> sequences deleted.  Our next step is to transform these promoters into <em>E. coli</em> cells with deleted xylose metabolism and transporters. </p>
+<table> <!-- this table separates content into column-like quadrants -->
+        <tr>
+          <td style="padding-top:30px; padding-right:30px" valign="top" width="33%"><h4>"Smart Fold" Pthalate Biosensor</h4>
+            <hr />
 </div>
 <div id="psugallery" style="float: right; clear: right; width: 500px;">
@@ Line 214: / Line 232: @@
   </div>
+</td>
+<td style="padding-top:30px; padding-right:30px" valign="top" width="33%"><h4>"Nuclear Fusion" BPA Biosensor</h4>
+            <hr />
 </div>
 <div id="psugallery" style="float: right; clear: right; width: 500px;">
@@ Line 221: / Line 244: @@
   </div>
+</td>
+<td style="padding-top:30px; padding-right:30px" valign="top" width="33%"><h4>"Nuclear Fusion" BPA Biosensor</h4>
+            <hr />
 </div>
 <div id="psugallery" style="float: right; clear: right; width: 500px;">
@@ Line 227: / Line 254: @@
    <div class="gallerytext"><p>P3 induction time</p></div>
   </div>
-<p>The cells were induced iduced with sugars and then allowed to grow with sample being removed every half hour.  The goal was to find the induction time where fluorescence starts to level off.  The intensity has leveled off and begins to drop after 7.5 hours so this was the growth time for all future tests.
-</p>
-</div>
-<div id="psugallery" style="float: right; clear: right; width: 500px;">
- <div class="gallerybox" style="width: 155px; float: left; clear: none;">
-  <div class="thumb" style="padding: 18px 0pt; width: 150px;"><div style="margin: auto; width: 120px;"><a href="/Image:PN_linear_penn_state08.jpg" class="image" title="PN_linear_penn_state08.jpg"><img alt="" src="/wiki/images/f/fb/PN_linear_penn_state08.jpg" border="0" height="110" width="120"></a></div></div>
-  <div class="gallerytext"><p>PN linear range</p></div>
- </div>
-</div>
-<div id="psugallery" style="float: right; clear: right; width: 500px;">
- <div class="gallerybox" style="width: 155px; float: left; clear: none;">
-  <div class="thumb" style="padding: 18px 0pt; width: 150px;"><div style="margin: auto; width: 120px;"><a href="/Image:P1_linear_penn_state08.jpg" class="image" title="P1_linear_penn_state08.jpg"><img alt="" src="/wiki/images/c/c9/P1_linear_penn_state08.jpg" border="0" height="110" width="120"></a></div></div>
-  <div class="gallerytext"><p>P1 linear range</p></div>
- </div>
-</div>
-<div id="psugallery" style="float: right; clear: right; width: 500px;">
- <div class="gallerybox" style="width: 155px; float: left; clear: none;">
-  <div class="thumb" style="padding: 18px 0pt; width: 150px;"><div style="margin: auto; width: 120px;"><a href="/Image:P3_linear_penn_state08.jpg" class="image" title="P3_linear_penn_state08.jpg"><img alt="" src="/wiki/images/f/f5/P3_linear_penn_state08.jpg" border="0" height="110" width="120"></a></div></div>
-  <div class="gallerytext"><p>P3 linear range</p></div>
- </div>
-<p>The three promoters analyzed show linear behavior in the optical density range.  The strength of fluorescence did change depending on the promoter.  With this information we were able to accurately normalize fluorescence data.
-</p>
-<table> <!-- this table separates content into column-like quadrants -->
-        <tr>
-          <td style="padding-top:30px; padding-right:30px" valign="top" width="45%"><h4>"Smart Fold" Pthalate Biosensor</h4>
-            <hr />
-</div>
-<div id="psugallery" style="float: right; clear: right; width: 500px;">
- <div class="gallerybox" style="width: 155px; float: left; clear: none;">
-  <div class="thumb" style="padding: 18px 0pt; width: 150px;"><div style="margin: auto; width: 120px;"><a href="/Image:DH5a_fluor_penn_state08.jpg" class="image" title="DH5a_fluor_penn_state08.jpg"><img alt="" src="/wiki/images/0/0f/DH5a_fluor_penn_state08.jpg" border="0" height="110" width="120"></a></div></div>
-  <div class="gallerytext"><p>DH5a fluoresence</p></div>
- </div>
 </td>
-<td style="padding-top:30px; padding-right:30px" valign="top" width="45%"><h4>"Nuclear Fusion" BPA Biosensor</h4>
-            <hr />
-</div>
-<div id="psugallery" style="float: right; clear: right; width: 500px;">
- <div class="gallerybox" style="width: 155px; float: left; clear: none;">
-  <div class="thumb" style="padding: 18px 0pt; width: 150px;"><div style="margin: auto; width: 120px;"><a href="/Image:W3110_fluor_penn_state08.jpg" class="image" title="W3110_fluor_penn_state08.jpg"><img alt="" src="/wiki/images/8/83/W3110_fluor_penn_state08.jpg" border="0" height="110" width="120"></a></div></div>
-  <div class="gallerytext"><p>W3110 fluoresence</p></div>
- </div>
 </p></td>
@@ Line 283: / Line 260: @@
 </table>
-<p>These graphs show the normalized fluoresence strength for PN, P1, and P3 xylose promoters induced with xylose, glucose, and a mixture.  The W3110 cells have <em>xylE</em> and <em>xylG</em> knocked out while DH5α still contain the natural xylose transport and metabolim.  This data shows that there is little effect on the fluorescence intensity using strains with <em>xylE</em> and <em>xylG</em> sequences deleted.  Our next step is to transform these promoters into <em>E. coli</em> cells with deleted xylose metabolism and transporters. </p>
+<p>The cells were induced iduced with sugars and then allowed to grow with sample being removed every half hour.  The goal was to find the induction time where fluorescence starts to level off.  The intensity has leveled off and begins to drop after 7.5 hours so this was the growth time for all future tests.
+</p>
 <table> <!-- this table separates content into column-like quadrants -->
@@ Line 292: / Line 272: @@
 <div id="psugallery" style="float: right; clear: right; width: 500px;">
   <div class="gallerybox" style="width: 155px; float: left; clear: none;">
-   <div class="thumb" style="padding: 18px 0pt; width: 150px;"><div style="margin: auto; width: 120px;"><a href="/Image:PN_time_penn_state_08.jpg" class="image" title="PN_time_penn_state_08.jpg"><img alt="" src="/wiki/images/2/29/PN_time_penn_state_08.jpg" border="0" height="110" width="120"></a></div></div>
+   <div class="thumb" style="padding: 18px 0pt; width: 150px;"><div style="margin: auto; width: 120px;"><a href="/Image:PN_linear_penn_state08.jpg" class="image" title="PN_linear_penn_state08.jpg"><img alt="" src="/wiki/images/f/fb/PN_linear_penn_state08.jpg" border="0" height="110" width="120"></a></div></div>
-   <div class="gallerytext"><p>PN induction time</p></div>
+   <div class="gallerytext"><p>PN linear range</p></div>
   </div>
@@ Line 304: / Line 284: @@
 <div id="psugallery" style="float: right; clear: right; width: 500px;">
   <div class="gallerybox" style="width: 155px; float: left; clear: none;">
-   <div class="thumb" style="padding: 18px 0pt; width: 150px;"><div style="margin: auto; width: 120px;"><a href="/Image:P1_time_penn_state08.jpg" class="image" title="P1_time_penn_state08.jpg"><img alt="" src="/wiki/images/8/8d/P1_time_penn_state08.jpg" border="0" height="110" width="120"></a></div></div>
+   <div class="thumb" style="padding: 18px 0pt; width: 150px;"><div style="margin: auto; width: 120px;"><a href="/Image:P1_linear_penn_state08.jpg" class="image" title="P1_linear_penn_state08.jpg"><img alt="" src="/wiki/images/c/c9/P1_linear_penn_state08.jpg" border="0" height="110" width="120"></a></div></div>
-   <div class="gallerytext"><p>P1 induction time</p></div>
+   <div class="gallerytext"><p>P1 linear range</p></div>
   </div>
 </td>
@@ Line 315: / Line 294: @@
 <div id="psugallery" style="float: right; clear: right; width: 500px;">
   <div class="gallerybox" style="width: 155px; float: left; clear: none;">
-   <div class="thumb" style="padding: 18px 0pt; width: 150px;"><div style="margin: auto; width: 120px;"><a href="/Image:P3_time_penn_state08.jpg" class="image" title="P3_time_penn_state08.jpg"><img alt="" src="/wiki/images/7/75/P3_time_penn_state08.jpg" border="0" height="110" width="120"></a></div></div>
+   <div class="thumb" style="padding: 18px 0pt; width: 150px;"><div style="margin: auto; width: 120px;"><a href="/Image:P3_linear_penn_state08.jpg" class="image" title="P3_linear_penn_state08.jpg"><img alt="" src="/wiki/images/f/f5/P3_linear_penn_state08.jpg" border="0" height="110" width="120"></a></div></div>
-   <div class="gallerytext"><p>P3 induction time</p></div>
+   <div class="gallerytext"><p>P3 linear range</p></div>
   </div>
 </td>
@@ Line 324: / Line 303: @@
 </table>
-<p>The cells were induced iduced with sugars and then allowed to grow with sample being removed every half hour.  The goal was to find the induction time where fluorescence starts to level off.  The intensity has leveled off and begins to drop after 7.5 hours so this was the growth time for all future tests.
+<p>The three promoters analyzed show linear behavior in the optical density range.  The strength of fluorescence did change depending on the promoter.  With this information we were able to accurately normalize fluorescence data.
 </p>