Figure 1

(1-1) Appearance of calcified microcapsules of botulinum toxin type D; (1-2) Microcapsule after alginate/protamine wrap; (1-3) Alginic acid/protamine/silica.
(1-1) Appearance of calcified microcapsules of botulinum toxin type D; (1-2) Microcapsule after alginate/protamine wrap; (1-3) Alginic acid/protamine/silica.