Number of amino acids per protein molecule

protein*

{{r}}

amino acid Cyto Hb alpha Hb beta RNase Lys Chgen Fdox

lysine 18 11 11 10 6 14 4

histidine 3 10 9 4 1 2 1

arginine 2 3 3 4 11 4 1

aspartic acid** 8 12 13 15 21 23 13

threonine 7 9 7 10 7 23 8

serine 2 11 5 15 10 28 7

glutamic acid** 10 5 11 12 5 15 13

proline 4 7 7 4 2 9 4

glycine 13 7 13 3 12 23 6

alanine 6 21 15 12 12 22 9

half-cystine 2 1 2 8 8 10 5

valine 3 13 18 9 6 23 7

methionine 3 2 1 4 2 2 0

isoleucine 8 0 0 3 6 10 4

leucine 6 18 18 2 8 19 8

tyrosine 5 3 3 6 3 4 4

phenylalanine 3 7 8 3 3 6 2

tryptophan 1 1 2 0 6 8 1

total 104 141 146 124 129 245 97

*Cyto = human cytochrome c; Hb alpha = human hemoglobin A, alpha-chain; Hb beta = human hemoglobin A, beta-chain; RNase = bovine ribonuclease; Lys = chicken lysozyme; Chgen = bovine chymotrypsinogen; Fdox = spinach ferredoxin.

**The values recorded for aspartic acid and glutamic acid include asparagine and glutamine, respectively.