The effects of different gravity or rotation administered for 96 or 14
4 hours continually on protein and nucleic acids contents in muscles o
f Japanese quail were determined. It was shown that hypergravity affec
ts the contents of sarcoplasmic and myofibrillar proteins, as well as
RNA and DNA, but the response of individual muscles to hypergravity is
different. It was shown that m. pectoralis is more influenced by hype
rgravity than m. supracoracoides while the protein or nucleic acid pat
terns in thigh or calf muscles are influenced to a smaller extent. The
effect of rotation is not linear in the range above 0 of angular velo
city and is different with regard to examined parameter. Nucleic acid
ratios did not show any changes, while the contents of sarcoplasmic or
myofibrillar proteins were considerably affected. The extrapolation o
f values to zero gravity, as well as comparison with values from actua
l space flight, were made.