Does my oligomer has a phosphate on 3 or 5 terminus?
No it does not, unless you specifically requested a 3′ or 5′ phosphorylated product. Delivered oligomers have a hydroxy group on both the 5′ and 3′ ends and are completely deprotected, desalted, and have been checked for quality by the analytical PAGE. The oligomers you pick up are ready to dilute and use.