If in the tail region of a myosin molecule all residues in a and d positions of the coiled-coil heptade repeat are changed to serines, what will happen to,
a) myosin molecule? (10 points).
b) thick filament? (10 points).
2. As the myosin is the backbone for thickfilaments , if they are inactivated the stiffness of the thick Filament may decreased and there will impairment in muscle contraction and relaxation
If in the tail region of a myosin molecule all residues in a and d positions...
b) Which of the following are true statements about myosin? Select all the true statements. Each myosin head has a binding site for actin and ATP The interaction between myosin and actin converts chemical energy to mechanicall work muscle contraction, thick and thin filaments slide past each other causing an overall lengthening of the muscle. In a muscle cell, myosin tails group together to form a thick filament The myosin-actin reaction cycle is powered by ATP hydrolysis The tail of...
Hydrophobic residues usually appear at the first and fourth positions in the seven-residue repeats of polypeptides that form coiled coils. The first and fourth side chains are buried in the coiled coil, but the remaining side chains are exposed to the solvent and therefore tend to be polar or charged. Which of the following sequences is more likely to appear in a coiled coil? 275 0.728 a) Ile-Gln-Glu-Val-Glu-Arg-Asp## 15 0.040 b) Trp-Gln-Glu-Tyr-Glu-Arg-Asp 11 0.029 c) Ile-Gln-Glu-Val-Glu-Ala-Asp 8 0.021 d) Trp-Gln-Glu-Tyr-Glu-Ala-Asp
Three samples of tropomyosin fragments have been measured, one wild type and two mutants: Tpm WT, Tpm R91C and Tpm R91P. This fragment should form a coiled coil structure, therefore we expect to see spectra typical for alpha-helices. Our task is to find out if the mutations affect the structure and stability of this protein. Wild type sequence: GSHMCGGLKDAQEKLELAEKKAADAEAEVASLNRRIQLVEEELDRAQERLATALQKLEEAEKAA DESERGMKVIENRALKDEEKMELQEIQLKEAKHI 1. (15 points) Show sequences of all fragments aligned (R is the only residue to change; use courier font for...
4. Please match each of the following structures with its correct description (4 pts) Tropomyosin Titin Myosin Troponin Sarcoplasmic reticulum e. elastic filament that anchors the thick myofilaments to the Z-disc complex of T-Tubules a. main protein of the thick filament, head has two binding sites one binds actir b. long, filament protein covering the myosin-binding sites on each actin molecule c. main protein of the thin myofilament, each individual protein has a high affinity d. control protein on the...
What are the substituent positions in the most stable form of the
following molecule?
#1: What are the substituent positions in the most stable form of the following molecule? A. 3 axial methyls, equatorial t-butyl B. 2 axial methyls, 1 equatorial methyl and t-butyl C. 1 axial methyl, 2 equatorial methyls and t-butyl D. Axial t-butyl, 3 equatorial methyls E. 1 axial methyl and t-butyl, 2 equatorial methyls F. 2 axial methyls and t-butyl, 1 equatorial methyl G. All substituents...
I just could not figure out how to do all this.
For the "print the ones you like" part, I need a few examples,
3-4.
For the next part, you are welcome to choose any two from the
list.
In this problem, we will practice making protein structures. Download RasMol from www.umass.edu/microbio/rasmol/index.htm (or http://openrasmol.org), or http other free molecular rendering software. Go to the Protein Data Bank, http On the main page, try searching for and viewing molecules (see also...
c)Draw the chemical structure of sodium benzoate and include all charges. d)Circle and label the region of the molecule that exhibits polar behavior. e) What is the strongest intermolecular force with which sodium benzoate will interact with the solvent water? In general, I am taking Organic Chemistry and I have no idea how to answer questions such as, " what are the intermolecular forces present in the non polar region of the molecule". Can someone help me with a guide...
Answer all of the following questions:
5. A molecule in a pa orbital is placed in region of uniform magnetic field Bo that points in the +z-axis. The t 0 state is given by b(0)) = |Px) = (1,-1) 1,1)), where the basis states are the orbital angular momentum eigenstates |l, m). The Hamiltonian in this situation is given by H = L B = woL2, where е Во 2m wo 2m (a) (10 points) Find |(t)) (b) (10 points)...
1 pts DI Question 6 What region of this molecule shown would bind to mRNA during translation? 3' A-OH 5' A Cacceptor stem G C G- U TuC loop D-loop C U GACAC m'A GGAGAGm m' G C-G A-U variable loop Anticodon loop Cm U A Gm A A The 5' end The anticodon loop The 3 end The variable loop The acceptor stem D Question 7 1 pts What is synthesized during transcription? O a strand of tRNA O...
Select all that apply. Atom A reacts with molecule BC according to the following reaction: 10 points A + BC → products If an atom of A collides with a molecule of BC, but no reaction occurs, what are the possible reasons why? Select all that apply. A. The reactants are moving too rapidly for the reaction to occur. B. There are too few of one of the reactants for the reaction to occur. c. The reactants did not collide...