The U3-RNP (Fibrillarin) particle is thought to participate in the first step of preribosomal RNA processing. Anti-U3 RNP antibodies have been shown to be highly specific for patients with SSc.
Mix by gentle inversion, 5 time
Gold serum separator (SST) tube
Refrigerated (preferred) - 14 days
Ambient - 7 days
Frozen - 60 days
Freeze/thaw cycles - stable x1
RIPA Gel Radiography