... before the reproductive period. To determine the relationship between these seasonal rhythms in amino acid concentration in RBCs and the in vivo amino acid levels in plasma, the plasma concentrations of L-alanine, L-serine and glycine were measured. The plasma levels of all three amino acids remained...

...M. A. Gallardo; J. Planas; J. Sánchez ABSTRACT We studied the uptake of L-serine by trout red blood cells and the effect of a -adrenergic agonist (isoproterenol) on this process. The results obtained indicate that L-serine is taken up by these cells by means of a concentrative process. The uptake...