Fig. 4. Cardiac myofibril cytoarchitecture in mlp84B-deficient flies.
mpl84B–/– (A,B) and
mlp84B–/– rescue (C,D) adult
Drosophila hearts were co-stained with anti-
-actinin and
anti-Mlp84B antibodies. mlp84B–/– hearts show
sarcomeric disorganization of the longitudinal fibers as evidenced by
misalignments and gaps in
-actinin-positive bands (A). Sarcomeric
structure is restored in the mlp84B–/– rescue
line (C). Cardiac spiral myofibers were visualized in
cypher-GFP;mlp84B–/– (E,F) and
cypher-GFP;mlp84B–/– rescue (G,H) hearts. The
A3 segment is shown, including the ostia in the center. No obvious structural
defect was detected (E). All scale bars are 20 µm.