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Table 5 Mean granule amino acid (n = 5) and ACC composition (n = 7)

From: Biomineralisation by earthworms – an investigation into the stability and distribution of amorphous calcium carbonate

Amino acid content / pico mol mg −1

Hamble

Soil Science

St Albans field

LOD

Asx

217 ± 103

293 ± 74

269 ± 31

40

Glx

145 ± 80

150 ± 29

173 ± 27

59

Ser

179a ± 20

128b ± 33 (2)

129b ± 17

107

L Thr

108a ± 16

84ab ± 23

78b ± 11

25

L His

16 ± 1

15 ± 9 (1)

22 ± 6

5

Gly

262 ± 40 (1)

223 ± 70 (3)

228 ± 74 (3)

212

L Arg

50a ± 8

29b ± 14 (3)

39ab ± 6 (1)

31

Ala

227a ± 43

173a ± 54

131ab ± 17

39

Tyr

7a ± 3 (2)

BDb

BDab

6

Val

146 ± 44

148 ± 46

133 ± 24

30

Phe

31 ± 5 (1)

40 ± 12 (1)

33 ± 8 (1)

28

Leu

97 ± 33 (4)

133 ± 48 (2)

128 ± 45 (2)

103

Ile

58 ± 16

78 ± 24

61 ± 8

35

Met

BD

9 ± 5 (3)

10 ± 6 (4)

10

ν3: ν4 areas

23.15a ± 0.97

27.41b ± 3.24

27.91b ± 1.33

 

% ACC (ν3: ν4)

1.04a ± 0.60

3.69b ± 2.01

3.99b ± 0.83

 

ν2: ν4 areas

2.56a ± 0.07

2.90b ± 0.30

2.90b ± 0.11

 

% ACC (ν2: ν4)

−25.82a ± 1.10

−20.69b ± 4.52

−20.77b ± 1.60

 
  1. Determined on sets of granules taken from the “bulk granule” sets obtained in 2008. Values are given ± standard deviation. Number in bracket after standard deviation indicates number of samples below detection (BD) limit. LOD shows limit of detection. Concentration < LOD were included in the statistical analysis.
  2. a,bAcross rows values with different superscripts are significantly different from each other based upon the Tukey test with p ≤ 0.05.