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Fig. 1. Scatter plot of gene expression by DNA microarray analysis. The whole gene
expression profile is plotted as gray spots. Squares and triangles indicate
muscle-related genes and their transcription factors, respectively. The closed
squares indicate significantly lower expression in response to spaceflight.
These groups include myosin heavy chain (MHC) isoforms, troponins and
tropomyosins whereas the open squares include actins and non-muscle
myosins.