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Morphological defects in nas-6 mutants. A) Head region of a wild type animal. The arrow points to the grinder in the second bulb of the pharynx. B) Morphological defects in the second bulb of the pharynx in nas-6 mutants (arrow). C) Morphological abnormalities of the grinder in nas-6 mutants (arrow). Scale bar 10 μm.
