Biochemistry
8th Edition
ISBN: 9781464126109
Author: Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr., Lubert Stryer
Publisher: W. H. Freeman
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Chapter 12, Problem 19P
Interpretation Introduction
Interpretation:
The reason for the membrane proteins to be more difficult to purify and crystallize needs to be explained.
Concept introduction:
With biological membranes, membrane proteins get interacted. There are three functions of membrane proteins. They are integral, peripheral membrane proteins and polypeptide toxins. Transmembrane and integral monotopic proteins are the subparts of integral proteins.
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Please help with this Mass Spectrometry Question. Thank you
For the mass spec. shown in the attached image, please determine and give the amino acid sequence of the pentapeptide. Show which end is the amino terminus and which is the carboxy terminus. How does one arrive at the solution?
Draw a tripeptide of your choosing at pH 7. Have the N-terminus on the left and the C-terminus on the right. Then:
Draw a triangle around the α-carbons.
Draw a box around the R-groups.
Circle the atoms capable of hydrogen bonding.
Highlight the atoms involved in the formation of the peptide bonds.
What type of structure have you drawn? (primary, secondary, tertiary or quaternary protein structure).
2. For the flow of fluid over a flat membrane of length 10cm,
determine the length-average mass transfer coefficient. The
relevant properties of the system are u=0.01cm²/s, D=5 x 106
cm²/s, and v = 5.0 cm/s.
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