5' end amino labeling of DNA

Does any body has an idea about the way that we can introduce amino
group at 5' end of dna strand. I know that we can order the oligo with
amino group in their 5' end. How do this companies do it?

Historians believe that in newspost
<1144185383.201128.294060@u72g2000cwu.googlegroups .com> on Tue, 4 Apr
2006, ali <[Only registered users see links. ]> penned the following literary masterpiece:

It's a standard phosphoramidite, so easy to add on, albeit 'expensive'
'cos you have to use the bottle up within a day or two of opening it.

[Only registered users see links. ]

Duncan
--
I love deadlines. I especially like the whooshing noise they make as
they go flying by.

Duncan Clark
GeneSys Ltd.