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. 2017 Apr 13;8:15066. doi: 10.1038/ncomms15066

Figure 4. Symmetric vaterite grown in nonacidic amino acids.

Figure 4

Unlike the chiral structures formed using chiral acidic amino acids, characteristic hexagonal symmetric vaterite crystals form in the presence of neutral (a) L-alanine (L-Ala) and (b) D-Ala, and basic (c) L-lysine (L-Lys) and (d) D-Lys for 8 h, and achiral glycine (Gly) after 1 h (e), 2 h (f), 4 h (g), 12 h (h) and 24 h (i) of growth. Scale bars, 10 μm (ad), 2 μm (e), 4 μm (f), 8 μm (g), 12 μm (h) and 20 μm (i).