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. 2013 Jul 17;178(7):1170–1176. doi: 10.1093/aje/kwt079

Appendix Table 1.

Symbols for Computation of DNA Yields Equivalent to 5 mL of Whole Blood

Source Volume Symbol, mL Approximate Volume, mL DNA Yield Symbol, μg
Samples used for fresh and frozen DNA extraction
 Whole blood (tube has fresh whole blood volume = Vtube1)
  White cell (fresh) Vwbcwb 1 Ywbcwb
  Fresh DNA extraction Vfrwb 4 Yfrwb
  Frozen DNA extraction Vfzwb 4 Yfzwb
 All-cell-pellet (tube has fresh whole blood volume = Vtube2)
  White cell (fresh) Vwbcacp 1 Ywbcacp
  Fresh DNA extraction Vfracp 2 Yfracp
  Frozen DNA extraction Vfzacp 2 Yfzacp
 Buffy coat/residual blood cells (tube has fresh whole blood  volume = Vtube3)
  For buffy coat white cell (fresh) Vwbcbc 0.5 Ywbcbc
  For buffy coat fresh DNA extraction Vfrbc 1 Yfrbc
  For buffy coat frozen DNA extraction Vfzbc 1 Yfzbc
  Residual blood cells white cell (fresh) Vwbcrbc 0.5 Ywbcrbc
  Residual blood cells fresh DNA extraction Vfrrbc 1 Yfrrbc
  Residual blood cells frozen DNA extraction Vfzrbc 1 Yfzrbc
Samples used for fresh DNA extraction only
 Whole blood Vfrwb 8.5 Yfrwb
 All-cell-pellet Vfracp 5 Yfracp
 Buffy coat Vfrbc 1.5 Yfrbc
 Residual blood cells Vfrrbc 1.5 Yfrrbc