Or why cats and dogs are malariafree.
Taurine, a sulfur-containing amino acid, is the most abundant amino acid in mammals, occurring both in cells and in blood plasma. High concentrations of taurine are found in the heart, retina, bile, brain, plasma, platelets, leucocytes, whereas smaller amounts are found in liver, erythrocytes, muscles, kidney.
Cécile Petton. La taurine: point sur ses propriétés et son utilization en 2011. Thèse de doctorat. Université dde Nantes 2011.