Chemistry, 18.09.2019 04:00 Chewbacka2020
The side chain of histidine has a typical pka value in the range of 6.5-7.4. however, when analyzing the pka values in a particular protein, scientists determined that one particular his residue has an unusually low pka value of 4.8. which of the following statements correctly explain this anomaly?
1) the microenvironment around a residue can impact its pka value.
2) a positively charged amino acid must be in close proximity to this residue.
3) a negatively charged amino acid must be in close proximity to this residue.
statements 1 and 2 are correct.
statements 1 and 4 are correct.
statements 1, 2, and 4 are correct.
statements 2, 3, and 4 are correct.
4) this residue must be located on the surface of the protein.
Answers: 2
Chemistry, 21.06.2019 22:30
Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution? a. 3.88 m, b. 1.03 m, c. 1.5 m, d. 15.5 m
Answers: 3
Chemistry, 22.06.2019 06:40
Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.
Answers: 3
Chemistry, 22.06.2019 07:20
The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.
Answers: 1
Chemistry, 22.06.2019 11:20
Which of the following contributes to the structural rigidity of cellulose? adjacent glucose polymers are stabilized by hydrogen bonding. glucose residues are joined by (α1→4) linkages. cellulose is a highly branched molecule. the conformation of the glucose polymer is a coiled structure.
Answers: 2
The side chain of histidine has a typical pka value in the range of 6.5-7.4. however, when analyzing...
Mathematics, 03.12.2021 23:40
Mathematics, 03.12.2021 23:40
Mathematics, 03.12.2021 23:40
Mathematics, 03.12.2021 23:40
Mathematics, 03.12.2021 23:40
History, 03.12.2021 23:40
Chemistry, 03.12.2021 23:40
Mathematics, 03.12.2021 23:40
Mathematics, 03.12.2021 23:40