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Table 4 Amino acids content of purified cholesterol oxidase produced by Streptomyces aegyptia NEAE 102

From: Purification, characterization and amino acid content of cholesterol oxidase produced by Streptomyces aegyptia NEAE 102

Amino acid

Residue concentration

Estimated no. of residues/mola

(to nearest integer)

μg/ml

nmol/ml

g/mol

Mol.%

 

Hydrophobic

Aliphatic

 Glycine (Gly)

5.53

73.71

75.06

10.76

39

 Alanine (Ala)

7.77

87.26

89.09

12.73

46

 Isoleucine (Ile)

3.46

26.40

131.17

3.85

14

 Leucine (Leu)

10.28

78.71

130.67

11.49

42

 Valine (Val)

3.66

31.21

117.14

4.55

16

Aromatic

 Phenylalanine (Phe)

5.71

34.54

165.17

5.04

18

Charged

Acidic

 Aspartic acid (Asp + Asn)

5.62

42.24

133.00

6.16

22

 Glutamic acid (Glu + Gln)

11.49

78.12

147.11

11.40

41

Basic

 Histidine (His)

5.91

38.10

155.17

5.56

20

 Lysine (Lys)

5.48

37.46

146.18

5.47

20

 Arginine (Arg)

8.67

49.79

174.19

7.27

26

Polar

 Serine (Ser)

4.31

40.96

105.10

5.98

22

 Threonine (Thr)

5.27

44.26

119.11

6.46

23

 Methionine (Met)

0.33

2.21

148.42

0.32

1

Aromatic

 Tyrosine (Tyr)

3.67

20.28

181.16

2.96

11

 Total

    

361

  1. aThe number of calculated amino acid based on: if the MW of the purified enzyme is 46000 Da and average MW of the 20 most common aa is 110 Da, the no. of aa will be approximately 46000/110 = 418aa. Trp-residues cannot be determined, based on the methodology used. Pro residues were also not detectable. Because of the deletion of 2 of the 20 amino acids in the calculation: W, P (=10%), we have taken away 10% of aa