In studies with pyridoxine and other B6 compounds in blood, the active forms pyridoxal and pyridoxal phosphate were measured by differential assays using Lactobacillus casei. Red cell uptake of tritiated pyridoxine was also measured. A new metabolic pathway for conversion of pyridoxine to active forms was demonstrated in red cells.
Barbara B. Anderson, Catherine E. Fulford-Jones, J. Anthony Child, Michael E. J. Beard, Christopher J. T. Bateman