calculating the “Activity ([PNPP]) for each Supernatent.
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
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Question
I need help calculating the “Activity ([PNPP]) for each Supernatent.
I need to know how to solve this so I can fill out my purification table worksheet. Please help. This class is Biochemistry 1 Lab.

Transcribed Image Text:**Purification Table Part 2**
**Overview:**
For steps 3 through 8, you will use Acid Phosphatase assays to determine the amounts of the enzyme in your supernatants.
---
**Preparation and Dilutions:**
Prepare the following dilutions of each supernatant to determine the phosphatase activity:
| Supernatant | Dilution | Volume Sup (µL) | H2O (µL) | Total Volume (µL) |
|-------------|----------|------------------|----------|------------------|
| V | 1/100 | 1.5 | 498.5 | 500 |
| VI | 1/200 | 7.5 | 142.5 | 150 |
| IV | 1/200 | 7.5 | 142.5 | 150 |
| II | 1/100 | 7.5 | 142.5 | 150 |
| I | 1/25 | 9 | 441 | 450 |
| VI (blank) | 1/750 | 9 | 141 | 450 |
*Note*: You need at least 0.2 ml final volume for each fraction.
---
**Assay Reaction Preparation:**
1. Prepare the assay reaction for each fraction, plus a control containing no protein.
2. Create a mix containing the chemicals below. Due to pipeting errors, prepare a mix for eight tubes but use seven tubes.
3. Aliquot 0.3 ml of the mix into each of the seven tubes (add closest Sups).
*Master Mix Total Volume: 3000 µL*
| Reagent | Volume/tube (mL) | Volume in mix (mL) |
|------------------|------------------|--------------------|
| 1.0 M Sodium acetate | 0.05 | 0.4 |
| 1.0 M MgCl2 | 0.05 | 0.4 |
| H2O | 0.20 | 1.6 |
---
**Assay Execution:**
5. To each of the assay reactions, add 150 µL of either the appropriate diluted fraction (from step 3, one per tube) or H
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