IGHG1 and Parkinson disease: Among the identified proteins, Fibrinogen beta chain, ATP synthase subunit alpha, mitochondrial, Thyroglobulin, Peroxiredoxin-2, Immunoglobulin heavy constant gamma 1, Unconventional myosin-Ic, Actin, Actin, Alpha skeletal muscle, Alpha cardiac muscle 1, DNA repair protein XRCC3, Peroxiredoxin-1, Parkinson disease 7, Ras-related protein Rab-14, Alpha-enolase, Hemoglobin subunit beta and Methanethiol oxidase were found in more than one spot on the gels, which could be associated with the cleavage by enzymes,post-translational modifications, or the presence of different protein species.