Calculate protein concentration in unknown samples 1, 2, 3: Absorbance of Unknown 1 = 0.541 Absorbance of Unknown 2 = 0.85 Absorbance of Unknown 3 = 1.02 Standard Curve: Y = 0.0073x

Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
icon
Related questions
Question

Calculate protein concentration in unknown samples 1, 2, 3:

Absorbance of Unknown 1 = 0.541

Absorbance of Unknown 2 = 0.85

Absorbance of Unknown 3 = 1.02

Standard Curve: Y = 0.0073x

 

The table displayed is used to record data from an experiment involving bovine serum albumin (BSA) at a concentration of 1.0 mg/ml. The variables in the table are as follows:

1. **BSA Volume (µl):** Quantities of BSA solution used, ranging from 0.0 to 50.0 µl.

2. **[BSA] (µg/ml):** Calculated concentration of BSA, with values from 10 to 50 µg/ml.

3. **Absorbance at 595 nm:** Measured absorbance values, showing how much light is absorbed at a wavelength of 595 nm. The values range from 0.371 to 1.253.

4. **Net Absorbance at 595 nm:** Calculated by subtracting the blank absorbance from the sample absorbance. The data shows values between 0.188 and 0.882.

Below the table, a calculation is shown for converting BSA volume into concentration:

- Formula: \( x = \frac{1 \text{mg} \times 10 \mu\text{l}}{1 \text{ml}} \)
- Result: \( x = 10 \mu\text{g}/\mu\text{l} \)

There is also a note indicating that the "Net Absorbance" is calculated as "sample - blank." An example calculation given is:
- \( (0.707 - 0.371) \), leading to a net absorbance of 0.336.

This data is commonly used to create calibration curves for estimating the concentration of proteins in samples using spectrophotometric analysis.
Transcribed Image Text:The table displayed is used to record data from an experiment involving bovine serum albumin (BSA) at a concentration of 1.0 mg/ml. The variables in the table are as follows: 1. **BSA Volume (µl):** Quantities of BSA solution used, ranging from 0.0 to 50.0 µl. 2. **[BSA] (µg/ml):** Calculated concentration of BSA, with values from 10 to 50 µg/ml. 3. **Absorbance at 595 nm:** Measured absorbance values, showing how much light is absorbed at a wavelength of 595 nm. The values range from 0.371 to 1.253. 4. **Net Absorbance at 595 nm:** Calculated by subtracting the blank absorbance from the sample absorbance. The data shows values between 0.188 and 0.882. Below the table, a calculation is shown for converting BSA volume into concentration: - Formula: \( x = \frac{1 \text{mg} \times 10 \mu\text{l}}{1 \text{ml}} \) - Result: \( x = 10 \mu\text{g}/\mu\text{l} \) There is also a note indicating that the "Net Absorbance" is calculated as "sample - blank." An example calculation given is: - \( (0.707 - 0.371) \), leading to a net absorbance of 0.336. This data is commonly used to create calibration curves for estimating the concentration of proteins in samples using spectrophotometric analysis.
Expert Solution
steps

Step by step

Solved in 2 steps

Blurred answer
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Biochemistry
Biochemistry
Biochemistry
ISBN:
9781319114671
Author:
Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:
W. H. Freeman
Lehninger Principles of Biochemistry
Lehninger Principles of Biochemistry
Biochemistry
ISBN:
9781464126116
Author:
David L. Nelson, Michael M. Cox
Publisher:
W. H. Freeman
Fundamentals of Biochemistry: Life at the Molecul…
Fundamentals of Biochemistry: Life at the Molecul…
Biochemistry
ISBN:
9781118918401
Author:
Donald Voet, Judith G. Voet, Charlotte W. Pratt
Publisher:
WILEY
Biochemistry
Biochemistry
Biochemistry
ISBN:
9781305961135
Author:
Mary K. Campbell, Shawn O. Farrell, Owen M. McDougal
Publisher:
Cengage Learning
Biochemistry
Biochemistry
Biochemistry
ISBN:
9781305577206
Author:
Reginald H. Garrett, Charles M. Grisham
Publisher:
Cengage Learning
Fundamentals of General, Organic, and Biological …
Fundamentals of General, Organic, and Biological …
Biochemistry
ISBN:
9780134015187
Author:
John E. McMurry, David S. Ballantine, Carl A. Hoeger, Virginia E. Peterson
Publisher:
PEARSON