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A Novel Cysteine Knot Protein for Enhancing Sperm Motility That Might Facilitate the Evolution of Internal Fertilization in Amphibians

Fig 2

Base sequence of SMIS gene and its deduced amino acid sequence.

Bold line indicates the amino acid sequences obtained by Edman degradation of the SMIS. Gray shade indicated the conserved amino acids in the CK motif of the matrix type[9]. Dotted line shows the sites of the P1-P3 peptides. The P3 peptides with different sizes have same effect on motility. Doubled underline shows polyadenylation signal.

Fig 2

doi: https://doi.org/10.1371/journal.pone.0160445.g002