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What is the charge of a Peptide with sequence aggdrleeq at pH 7.0?
At a neutral pH i.e. pH 7, only five of the twenty common amino acids carry a net positive or a net negative charge. Aspartic acid and Glutamic acid are negatively charged (-1), at a neutral pH the carboxlic side chains lose a H+ ion Lysine, Arginine and Histidine are positively charged (+1), at a neutral pH the side chains accept a H+ ion. All other amino acids are generally uncharged (0). It is therefore easy to work out the net charge of any sequence. All sequences contain the one letter abbreviation for each amino acid. Here the sequence is "aggdrleeq" a=alanine (uncharged = 0) g=glycine (uncharged = 0) g=glycine (uncharged = 0) d=aspartic acid (negatively charged = -1) r=arginine (positively charged = +1) l=leucine (uncharged = 0) e=glutamic acid (charged = -1) e=glutamic acid (charged = -1) q=glutamine (uncharged = 0) Add up all the charges -3, +1 gives a total peptide charge of -2.
What is a substance with a pH of 6?
The pH scale runs from 0 to 14. Pure water has a pH of 7, the half-way point of the pH scale. A pH between 0 and 7 indicates that a solution is acidic, and the lower the pH, the higher the acidity. A pH between 7 and 14 indicates that a substance is alkaline, and the higher the pH, the higher the strength of the alkali.
What is 7 on the pH scale?
The pH scale ranges from 0 to 14 1) pH of 7 is neutral 2) pH less than 7 is acidic 3) pH greater than 7 is basic So the pH of 8 is basic since it is greater than 7
What is the pH range for an acid?
pH of 7 is neutral. there is no absolute ends to the pH scale, so an acid is anything with a pH rating of less then 7, and a base is anything greater then 7. for all practical purposes, a scale of 1-14 or sometimes 0-14 is used, but it is possible to exceed these constrainsts.
How many ATP do you get from one 20 carbon fatty acid?
Cycles of B-oxidation are (n/2)-1 for FADH2 and NADH. Cycles for Acetyl-CoA are (n/2). Multiply by ATP equivalents:1.5 per FADH2, 2.5 per NADH by 2.5, and 10 per Acetyl-CoA. Subtract 2 ATP from the final answer.Palmitic acid (16 carbons):7 FADH2, 7 NADH, 8 Acetyl-CoA(7*1.5)+(7*2.5)+(8*10)=108 ATP108 - 2 = 106 ATP (net).Stearic acid (18 carbons):8 FADH2, 8 NADH, 9 Acetyl-CoA(8*1.5)+(8*2.5)+(9*10)=122 ATP122 - 2 = 120 ATP (net).Arachidic acid (20 carbons):9 FADH2, 9 NADH, 10 Acetyl-CoA(9*1.5)+(9*2.5)+(10*10)=136 ATP136 - 2 = 134 ATP (net).
Net charge of histidine in pH 1 3 5 11?
pK1 = 2.3, pKr = 6, pK2 = 9.7 (all approximate) at physiological pH, histidine has no net charge. at pH 1, below all pKas and charge is +2 at pH 3, amine group proton pops off, so +1 charge at pH 5, still below 6 and above 2.3 so +1 charge if had pH above 6, for instance... at pH of 8 net charge is zero, or neutral... such that it is neutral at physiological pH (a bit above a pH of 7) at pH 11, exceeds all pKas of amine, acid group, and R group. So net charge of -1 amine deprotonation, carboxylic acid deprotonation, and R group deprotonation happen pH 11 because it exceeds all pKs
What is the charge on the lysine molecule when it is in a solution with a pH of 7?
The charge on the lysine molecule is positive when it is in a solution with a pH of 7.
What is the net charge of phosphatidylserine at pH 7?
DNA molecules are connected via a 5'-3' phosphodiester linkage to ribose molecules. The phosphate group within this linkage is contains a negatively charged oxygen atom at a PH of 7. This gives DNA its charge.
What is the charge on the perchlorate anion?
The pH depends on the concentration (how much is dissolved in a given volume of water) Since it is a strong monoprotic acid the pH equals the negative logarithm of its molar concentration. A 1M solution has a pH of 0 a .1M solution has a pH of 1 and so on until a pH of about 7.
What is the dominant charge on the side group of Asp at pH equals 7?
-1
What does it mean if something in science is neutral?
If something in science is neutral, it means it has a net charge of zero, indicating an equal number of positive and negative charges. This can apply to atoms, molecules, or ions that do not have an overall charge.
How to calculate net charge of a peptide?
To calculate the net charge of a peptide, you need to consider the charges on its constituent amino acids. Each amino acid has a specific charge due to its side chain at different pH values. Add up the charges of all the amino acids in the peptide and take into account any N- and C-terminal charges to calculate the overall net charge of the peptide.
What is the charge of aqueous NaOH or lye?
Sodium hydroxide is an alkali; the pH of the solution is over 7.
What is a neutral compound?
A neutral substance is a substance that has neither a positive nor a negative charge to it. It has the same amount of electrons as protons and therefore they cancel each other out. A neutral substance has a pH level of 7. Anything higher (8-14) has high base levels, anything lower (0-6) is acidic.
Which ranges on the pH scale are acidic basic and neutral?
pH 0 < acidic < pH 7 neutral = pH 7 pH 7 < basic < pH 14
What is the charge of a Peptide with sequence aggdrleeq at pH 7.0?
At a neutral pH i.e. pH 7, only five of the twenty common amino acids carry a net positive or a net negative charge. Aspartic acid and Glutamic acid are negatively charged (-1), at a neutral pH the carboxlic side chains lose a H+ ion Lysine, Arginine and Histidine are positively charged (+1), at a neutral pH the side chains accept a H+ ion. All other amino acids are generally uncharged (0). It is therefore easy to work out the net charge of any sequence. All sequences contain the one letter abbreviation for each amino acid. Here the sequence is "aggdrleeq" a=alanine (uncharged = 0) g=glycine (uncharged = 0) g=glycine (uncharged = 0) d=aspartic acid (negatively charged = -1) r=arginine (positively charged = +1) l=leucine (uncharged = 0) e=glutamic acid (charged = -1) e=glutamic acid (charged = -1) q=glutamine (uncharged = 0) Add up all the charges -3, +1 gives a total peptide charge of -2.
What has a pH level of 7-14?
an acid is anything below 7, and a base is anything above 7 pH is a measure of the amount of Hydrogen ions (H+) in a solution. Ions are just atoms that have an electric charge on them, so H+ is a hydrogen atom with charge of 1. Even in pure water ions tend to form due to random processes (producing some H+ and OH- ions). The amount of H+ that is made in pure water is about equal to a pH of 7. That's why 7 is neutral. For those who want a more complicated answer, pH is defined: pH = -log10[H+], where [H+] is the concentration of H+ , expressed in moles/liter. In pure water near room temperature, the concentration of H+ is about 10-7 moles/liter, which gives a pH of 7.
