Concept explainers
Interpretation:
To which terminal lysine will migrate in an isoelectric focusing experiment with gel of pH gradient
Concept introduction:
Isoelectric point (pI) or isoelectric pH is the pH at which the substance has a charge of zero. An amino acid’s pI is the average of two pKa values involving a zwitterions formation. Isoelectric focusing is a way used to separate amino acids or proteins using pH gradient.
If the pH of the solution is higher than the pI, the substance will deprotonate and will carry negative charge. Conversely, if the pH is lower than pI, the substance will protonate and will carry a positive charge. The substance remains uncharged if pI is equal to the pH and will not migrate to any electrode.
Any ion that has net positive charge (cations) will migrate toward the negatively charged terminal i.e. cathode and the ion with negative charge (anions) will migrate toward positively charged terminal i.e. anode.
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Chapter 6 Solutions
ORG CHEM W/ EBOOK & SW5 + STUDY GUIDE
- Using what we have learned in CHEM 2310 and up through class on 1/31, propose a series of reaction steps to achieve the transformation below. Be sure to show all reagents and intermediates for full credit. You do not need to draw mechanism arrows, but you do need to include charges where appropriate. If you do not put your group name, you will get half credit at most. ? Brarrow_forwardDraw a mechanism for the formation of 2-bromovanillin using bromonium ion as the reactive electrophile.arrow_forwardNonearrow_forward
- Chemistry for Today: General, Organic, and Bioche...ChemistryISBN:9781305960060Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. HansenPublisher:Cengage LearningOrganic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning
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