This is what your skeletal muscles look like when they have been labeled with fluorescent antibodies against a sarcoplasmic/ endoplasmic reticulum calcium ATPase (SERCA). Notice the striations (skeletal muscle is striated muscle) and the nuclear envelopes.

Immunofluorescent labeling of chicken myotubes grown in culture using an anti-SERCA1 monoclonal antibody. Photograph used with permission from Dr. Doug Fambrough, Johns Hopkins University.
(See Kaprielian et al., Journal of Cell Science 109: 2529-2537 (1996)).

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