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Fig. 3. (Top) Northern blot analysis of plasma membrane Ca2+-ATPase
(PMCA3) in various crayfish tissues in intermolt (A), premolt (B) and
postmolt (C). Total RNA (20 µg) from gill, antennal gland, cardiac muscle
and axial abdominal muscle was loaded in each lane. The membrane was
hybridized to a 1164 bp crayfish PMCA3 probe and exposed to X-ray
film for 24 h. (Bottom) To normalize the hybridization signal, 18s rRNA
concentration was run on a corresponding formaldehyde-agarose gel and
visualized by ethidium bromide staining under UV light before being
transferred to the membrane. The band size is indicated to the left.