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. 2017 May 17;12:11. doi: 10.1186/s13062-017-0182-5

Fig. 2.

Fig. 2

The bilaterally symmetrical body plan of most animals is generated by two, perpendicularly acting diffusible morphogen gradients: Wnt and BMP. The figure has been inspired by Fig. five of [5]. Note that the BMP gradient is oriented in the opposite direction in chordates