Movie S1.
HAP labeling was mainly observed on the surface of spherules. This was not the consequence of poor dye penetration, because the labeling was associated with the surface even on spherules that were cut on paraffin sections.
HAP labeling was mainly observed on the surface of spherules. This was not the consequence of poor dye penetration, because the labeling was associated with the surface even on spherules that were cut on paraffin sections.