Figure 2. Tissue localization of [¹⁴C]-labeled L-BMAA in a lactating mouse dam with discontinued nursing.

Autoradiogram showing very high levels of radioactivity in the mammary glands (MG) and other tissues of a lactating dam that nursed for 2 h and was killed 24 h after injection of [¹⁴C]L-BMAA. Compare the level of radioactivity of the dam nursing for 24 h ( Figure 1A ). The high retention of labeled substance in the mammary glands and all other tissues in the dam with discontinued nursing is due to interruption of milk excretion. White areas correspond to high levels of radioactivity.