Skip to main content

Table 11 Relative bioavailability values (RBV) of copper proteinate (CuPro) based on slope ratios from multiple linear regressions of ADG, FCR, plasma enzyme activities, and jejunal Cu concentrations on daily analyzed dietary Cu intake1

From: Optimal dietary copper requirements and relative bioavailability for weanling pigs fed either copper proteinate or tribasic copper chloride

Dependent variables Copper source2 Regression coefficients RBV P-value3
Slope SE % SE
ADG TBCC 0.8916 0.18485 100   
CuPro 1.63437 0.18347 183 34.9 0.0006
FCR TBCC −0.003535 0.00024 100   
CuPro −0.006068 0.00024 172 17.0 < 0.0001
ALP TBCC 0.018343 0.00195 100   
  CuPro 0.028563 0.00194 156 12.7 < 0.0001
CER TBCC 0.11645 0.06564 100   
  CuPro 0.306 0.06538 263 120.1 0.0013
Cu/Zn SOD TBCC 0.2185 0.17132 100   
  CuPro 0.4489 0.17063 205 126.4 0.1383
GSH-Px TBCC 0.6748 0.05870 100   
  CuPro 0.7661 0.05846 114 8.0 0.0678
MDA TBCC −0.011156 0.00396 100   
  CuPro −0.014865 0.00394 133 36.9 0.279
Jejunal Cu TBCC 0.00168 0.00035 100   
  CuPro 0.00349 0.00035 208 38.3 < 0.0001
  1. a Daily dietary analyzed Cu intake = ADFI times analyzed supplemental dietary Cu content (analyzed total Cu content – background Cu content) for each respective Cu source
  2. bTBCC  tribasic copper chloride, CuPro copper proteinate
  3. cP-value for the difference in slopes among Cu sources
  4. ALP alkaline phosphatase, CER ceruloplasmin, Cu/Zn SOD Cu, Zn-superoxide dismutase, GSH-Px glutathione peroxidase, MDA malondialdehyde