User:Michael F. Nagle/Notebook/Chem 571/2012/09/19: Difference between revisions
From OpenWetWare
Line 16: | Line 16: | ||
Starter cultures were centrifuged for 15 minutes at 4500rpm and resuspended in 4mL LB broth. | Starter cultures were centrifuged for 15 minutes at 4500rpm and resuspended in 4mL LB broth. | ||
## To inoculate the expression culture, resuspended cells were divided between flasks. | ## To inoculate the expression culture, resuspended cells were divided between flasks. | ||
*'''[[User:Abigail E. Miller|Abigail E. Miller]] 11:32, 7 October 2012 (EDT)''': more than that was done. those cells were then added to the 1L fernbach flasks. what time did this all occur? you need to link ot Mary's notebook since she is the one who actually did the experimental procedure. | |||
## 1mL .4M IPTG was added to each flask to start protein exprssion | ## 1mL .4M IPTG was added to each flask to start protein exprssion | ||
## Expression cultures were incubated at 160rpm and 37°C for 4 hours. | ## Expression cultures were incubated at 160rpm and 37°C for 4 hours. | ||
*'''[[User:Abigail E. Miller|Abigail E. Miller]] 11:32, 7 October 2012 (EDT)''':be more precise. at exactly what time was hte IPTG added? what time were hte expression cultures removed? | |||
## 30mL binding buffer was inserted to each flask. | ## 30mL binding buffer was inserted to each flask. | ||
## Flasks were centrifigued at 4500rpm for 15 minutes | ## Flasks were centrifigued at 4500rpm for 15 minutes | ||
*'''[[User:Abigail E. Miller|Abigail E. Miller]] 11:32, 7 October 2012 (EDT)''':binding buffer was used to resuspend cells after centrifugation. you need to link to someone's notebook if you did not do it. | |||
## Cells were collected and placed in the freezer at -80°C. | ## Cells were collected and placed in the freezer at -80°C. | ||
*'''[[User:Abigail E. Miller|Abigail E. Miller]] 11:32, 7 October 2012 (EDT)''':you need more details. | |||
#Binding buffer | #Binding buffer | ||
##made with 20mM Tris, .5M NaOH and 20-40mM amidazole at a pH of 7.4 | ##made with 20mM Tris, .5M NaOH and 20-40mM amidazole at a pH of 7.4 | ||
*'''[[User:Abigail E. Miller|Abigail E. Miller]] 11:32, 7 October 2012 (EDT)''':no made with...those are the exact chemicals and concentrations of the buffer. | |||
##.02M Tris solution *1L = .02moles Tris needed | ##.02M Tris solution *1L = .02moles Tris needed | ||
##.02mol Tris * 121.14g = 2.4228g Tris weighed | ##.02mol Tris * 121.14g = 2.4228g Tris weighed | ||
Line 34: | Line 40: | ||
#A buffer for elution was made with 20mM Tris, .5M NaCl and 500mM amidazole | #A buffer for elution was made with 20mM Tris, .5M NaCl and 500mM amidazole | ||
*'''[[User:Abigail E. Miller|Abigail E. Miller]] 11:32, 7 October 2012 (EDT)''':see above comment | |||
##.02M Tris solution *.5L = .01moles Tris needed | ##.02M Tris solution *.5L = .01moles Tris needed | ||
##.01mol Tris * 121.14g = 1.2114g Tris | ##.01mol Tris * 121.14g = 1.2114g Tris | ||
Line 45: | Line 52: | ||
#Tris buffer stock solution was inserted into HAuCl<sub>4</sub> and BSA tubes at molarities of .05mM, .5mM, 5mM, 50mM, 100mM, 200mM, 500mM and 1M | #Tris buffer stock solution was inserted into HAuCl<sub>4</sub> and BSA tubes at molarities of .05mM, .5mM, 5mM, 50mM, 100mM, 200mM, 500mM and 1M | ||
*'''[[User:Abigail E. Miller|Abigail E. Miller]] 11:32, 7 October 2012 (EDT)''':terminology - inserted is not the appropriate term. you add to solutions or reactions because it leads to an increase in moles or volume, not insert. | |||
##m<sub>1</sub>v<sub>1</sub>=m<sub>2</sub>v<sub>2</sub> | ##m<sub>1</sub>v<sub>1</sub>=m<sub>2</sub>v<sub>2</sub> | ||
##500mM*6mL=1000mM*x8##3mL | ##500mM*6mL=1000mM*x8##3mL |
Revision as of 08:32, 7 October 2012
Project name | <html><img src="/images/9/94/Report.png" border="0" /></html> Main project page <html><img src="/images/c/c3/Resultset_previous.png" border="0" /></html>Previous entry<html> </html>Next entry<html><img src="/images/5/5c/Resultset_next.png" border="0" /></html> |
Objectives
Procedure
Starter cultures were centrifuged for 15 minutes at 4500rpm and resuspended in 4mL LB broth.
ObservationsOne of the flasks with broth appeared a different shade of yellow this morning prior to centrifuging. |