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What is the molecular weight of a peptide chain with 40 residues? 0.36 Da 60 Da...
16. A hydrocarbon with a molecular weight of 100 Da (and expected molecular ion at 100 m 2) was analyzed by mass spectrometry and gave the spectra shown below. Based on the MS spectrum and considering possible fragmentation of the hydrocarbon, which of the molecules provided corresponds to this spectrum? 100- m/z = 57 Da Relative Intensity m/z = 85 Da Expected molecular ion (not observed) 10 20 30 40 tillo el origen los 50 60 70 80 90 100...
16. A hydrocarbon with a molecular weight of 100 Da (and expected molecular ion at 100 m 2) was analyzed by mass spectrometry and gave the spectra shown below. Based on the MS spectrum and considering possible fragmentation of the hydrocarbon, which of the molecules provided corresponds to this spectrum? 100- m/z = 57 Da Relative Intensity m/z = 85 Da Expected molecular ion (not observed) 10 20 30 40 tillo el origen los 50 60 70 80 90 100...
help with these please Examine the peptide. Thr-Glu-Pro-Ile-Val-Ala-Pro-Met-Glu-Tyr-Gly-Lys Write the sequence using one-letter abbreviations. sequence: TKPIVAPMEYGK Estimate the net charge on the peptide at pH 7. charge at pH 7: Estimate the net charge on the peptide at pH 12. Alpha helices are a type of secondary structure in proteins. What is the length of a 23.0 kDa single-stranded a-helical protein segment? Assume a mean residue mass of 110 Da. length: Beta () sheets are a type of secondary structure...
What is the length of an a-helix made of 40 residues? 27 angstroms 60 angstroms 11 angstroms 216 angstroms
5. A native protein has a molecular weight of 150,000 Da. Denaturing SDS electrophoresis results in two bands with molecular weights of approximately 53,000 and 23,000 Da. What arrangement of polypeptide chains in the native protein would best explain these results? 2. If two proteins have the same molecular weight, are they necessarily the same protein? Can you definitely assign the identity of a protein based on its molecular weight? Why or why not?
1. (4 points) Given that the average molecular weight of an amino acid is 110 daltons (Da), determine the following. Remember to convert between daltons and kilodaltons (kDa) where necessary. Each of your answers must be numerically correct and expressed in proper units (1 pt) and show how the value was arrived at using the amino acid molecular weight above (1 pt) for you to receive full credit. A. A molecule of human a-tubulin has a molecular weight of 50.1...
An enzyme has a molecular weight of 25,000 Da. If Vmax = 436 umol/min and you use 197 uL of a 1mg/mL solution of enzyme, what is the turnover number?
If the molecular weight of Protein G:B1 is 8 kDa, what is the concentration (in mg / mL) of a solution of this protein which has an absorbance (A) =0.2 at l = 280 nm? How many grams of protein are present in 1 mL of this solution?
If the molecular weight of Protein G:B1 is 8 kDa, what is the concentration (in mg / mL) of a solution of this protein which has an absorbance (A) =0.2 at l = 280 nm? How many grams of protein are present in 1 mL of this solution?
The molecular mass of a protein is 50000 Da. (A) What is the mg/mL concentration of a 40-µM solution of the protein? (B) What is the percentage concentration of this solution?