Scientists studying proteins express mass in terms of daltons, where one dalton = one atomic weight unit (amu). A kilodalton (kd) is 1,000 daltons. How many amino acid residues would you expect in a protein that has a mass of 50 kd?
Average molar mass of amino acids = 135g/mole
2007-05-30 09:59:58 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
50000 amino acid residues
2007-05-30 10:07:49 · answer #1 · answered by Anonymous · 0⤊ 0⤋
50 kD = 50,000 amu = 50,000 g/mol protein
135 g/mol amino acid
50,000 g/mol protein / 135 g/mol amino acid = 370 mol amino acid/mol protein
So, about 370 amino acids long.
2007-05-30 17:04:32 · answer #2 · answered by hcbiochem 7 · 0⤊ 0⤋
Average AA molecular weight is 115 or 0.115 kD
50 / 0.115 = 434.782609
2007-05-30 17:05:44 · answer #3 · answered by DanE 7 · 0⤊ 0⤋