IT is generally accepted that sodium taurocholate is a good lytic agent for erythrocytes, and a great number of reports on hæmolysis by this substance have been published1. Abnormal sigmoid timedilution curves are sometimes reported for taurocholate lysis, and frequent reference is made to the instability of the taurocholate solutions used by these authors. One report2 states qualitatively that a synthetic specimen of taurocholate was "moderately lytic", whereas a specimen prepared from natural sources was "strongly lytic". Two other reports3 also give a much lower hæmolytic activity for taurocholate than that generally accepted.
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