User:Matt Hartings/Notebook/AU Biomaterials Design Lab/2016/09/02: Difference between revisions

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Change in max wavelength as a function of time (signals the local environment of the tryptophan residues)
Change in max wavelength as a function of time (signals the local environment of the tryptophan residues) Note that the wavelength of emission maximum changes from 352 nm to 362 nm. Any changes to much higher wavelengths (that you WILL see in your spectra) are likely due to energy transfer to nearby energy accepting chemicals. 


[[Image:20160902 mrh Lysozyme pH4 emissionmax.png|500px]]
[[Image:20160902 mrh Lysozyme pH4 emissionmax.png|500px]]

Revision as of 08:09, 5 September 2016

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Objective

Measure lysozyme unfolding at pH 4 and 80 °C with no gold present. This is a complimentary measurement for here and here.

Description

measurement solution

  1. 12.5 μM lysozyme, pH 4
    1. 245 μL lysozyme stock solution from yesterday (153 μM)
    2. 500 μL 1 mM HCl
    3. 2255 μL water

(second sample)

  1. 1.25 μM lysozyme, pH 4
    1. 24.5 μL lysozyme stock solution from yesterday (153 μM)
    2. 500 μL 1 mM HCl
    3. 2475 μL water

(third sample)

  1. 0.51 μM lysozyme, pH 4
    1. 10 μL lysozyme stock solution from yesterday (153 μM)
    2. 500 μL 1 mM HCl
    3. 2490 μL water


Samples were run with the following conditions

  1. Excitation = 290 nm
  2. Emissionstart = 310 nm
  3. Emissionend = 540 nm
  4. Excitation slit width = 10.0 nm
  5. Emission slit width = 10.0 nm
  6. Scan Speed = 100 nm/min
  7. Data saved as: lysozyme_pH4_80C_time.sp

Data

The first two samples were too concentrated and saturated the detector.

I meant to take data every 5 minutes by took a sample at 3 minutes by mistake. It is labeled lysozyme_ph4_80C_05. The actual 5 minute sample is labeled as lysozyme_ph4_80C_05b.

From then, I keep the 1 sample every 5 min pace. So I have samples for: 0, 3, 5, 10, 15, 20, etc.


The three samples made at time 0 (Sample 3 was used for the rest of the measurements)




4 scans from the first 10 minutes of measurements




Change in max wavelength as a function of time (signals the local environment of the tryptophan residues) Note that the wavelength of emission maximum changes from 352 nm to 362 nm. Any changes to much higher wavelengths (that you WILL see in your spectra) are likely due to energy transfer to nearby energy accepting chemicals.




Change in integrated fluorescence intensity as a function of time

Notes

Special notes about fluorescence and the measurements we're taking.














Use categories like tags. Change the "Course" category to the one corresponding to your course. The "Miscellaneous" tag can be used for particular experiments, as instructed by your professor. Please be sure to change or delete this tag as required so that the categories remain well organized.




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