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Fig. 4. Transversal (A,B) and longitudinal (C) sections of ventral light organs
from M. norvegica. NOS-like IR is detected around capillaries at the
base of C-cells (A: staining at arrows, C-cells at arrowheads). IR against NOS
is also detected along the capillaries in the peripheral parts of the light
organ (B, arrows) and at both sides of the lens (C, arrows), possibly where
the photophore arteries enter the light organ. La, lantern; Le, lens; R,
reflector. Scale bars, 10 µm.