Help with a translation

Hi,

I'm translating some doujinshi for my own personal enjoyment and I've come across a sentence that confuses me.

ナメック星であんなに必死だったのに地球に来てからドラゴンボールのドの字もないじゃない.

More specifically ドラゴンボールのドの字もないじゃない. ("the character 'do' from dragonball is also not there"?)

I'm guessing it means something like loosing the spirit/interest for the dragonballs? Am I right about this one? (yes, It's a DBZ comic ^^; )

Thanks in advance

Maybe the phrase means as you are guessing, but we need the context to know what it really means.
XYZ の X の字もない is used to mean not showing (even) a glimpse of XYZ.
e.g. 反省 [hansei] のハの字もない
not showing a glimpse of repentance
= showing no sign of repentance

I see.

Here is a link to the comic http://ay-vb.sakura.ne.jp/ccdays/365_365_1.html It's a small one, only 3 pages(you can click through it) The part I'm talking about is right on the first page, last panel.