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Table 2 Distribution of Zn, Cu, Cd and total Hg in the insoluble fraction (centrifugation pellet), soluble fraction, high molecular weight proteins (HMWP), metallothionein-like proteins (MTs), and low molecular weight proteins (LMWP) of harbour porpoises stranded along the Belgian coast (concentration expressed in μg.g-1 dw).

From: Zn, Cu, Cd and Hg binding to metallothioneins in harbour porpoises Phocoena phocoena from the southern North Sea

   insoluble fraction soluble fraction
    HMWP MTs LMWP
Liver Zn n = 14 86 ± 58 (30 – 228) 53 ± 19 (29 – 104) 144 ± 165 (16 – 595) 1.8 ± 1.7 (<0.1–6.2)
   30 ± 20 % 19 ± 7 % 51 ± 58 % ~0%
  Cu n = 14 14 ± 12 (6 – 43) 5 ± 3 (1.3 – 12) 10 ± 11 (2 – 39) <0.1 (<0.1 – 6.1)
   48 ± 41 % 18 ± 10 % 34 ± 38 % ~0%
  Cd n = 14 0.2 ± 0.2 (0.01 – 0.6) 0.5 ± 0.6 (<0.1 – 1.8) 1.1 ± 0.8 (0.1 – 27) 0.5 ± 1 (<0.1 – 3.4)
   9 ± 9 % 21.5 ± 26 % 48 ± 36 % 21.5 ± 43 %
  Hg n = 14 43 ± 51 (0.5 – 167) 0.1 ± 0.1 (<0.1 – 0.3) <0.1 (<0.1 – 0.2) <0.1(<0.1)
   99.5 ± 12 % ~0.25 ± 0.02% ~0.25% ~0%
Kidney Zn n = 14 55 ± 12 (36 – 69) 40 ± 21 (23 – 105) 16 ± 5 (6 – 28) 4.4 ± 7 (<0.1 – 27)
   48 ± 10 % 35 ± 18 % 14 ± 4 % <4 ± 6 %
  Cu n = 14 8.8 ± 2.2 (6 – 13) 2.8 ± 1.8 (0.4 – 6.1) 2.9 ± 1.6 (0.6 – 6) <0.1 (<0.1)
   61 ± 15 % 19 ± 12 % 20 ± 11 % ~0%
  Cd n = 14 1.1 ± 1.8 (<0.1 – 5.6) 0.2 ± 0.6 (<0.1 – 0.9) 1.9 ± 2 (<0.1 – 5) 0.2 ± 0.8 (<0.1 – 1.7)
   33 ± 53 % 6 ± 18% 56 ± 59 % 5 ± 23 %
  Hg n = 10 3.2 ± 3.3 (0.7 – 12) 0.5 ± 0.3 (0.2 – 1.1) 0.3 ± 0.2 (0.1 – 0.4) 0.2 ± 0.1 (<0.1 – 0.5)
   76 ± 78% 12 ± 7% 7 ± 5% 5 ± 2%