Experimental evidence suggests that the nucleoid is largely composed of DNA, about 60%, with a small amount of RNA and protein. The latter two constituents are likely to be mainly messenger RNA and the transcription factor proteins found regulating the bacterial genome.
An ophthalmologist is a medical doctor (MD) or an osteopathic doctor (DO) who specializes in eye and vision care. Ophthalmologists are trained to perform eye exams, diagnose and treat disease, prescribe medications and perform eye surgery. They also write prescriptions for eyeglasses and contact lenses.
Doctors of Osteopathic Medicine (D.O.s) are physicians fully trained to diagnose illness, prescribe medications and perform surgery. The Federal Government and the American Medical Association recognize D.O.s and M.D.s as equivalent. Osteopathic physicians (D.O.s) are fully licensed, patient-centered medical doctors. They have full medical practice rights throughout the United States and in 44 countries abroad.