Krüppel
Krüppel is a gap gene which encodes a zinc finger protein with four tandemly repeated zinc finger domains.[1]
Krüppel means, literally, "cripple" in German.
Put into English, it actually controls the development of a zygote early on in its growth, causing a gap in the otherwise heterogeneous arrangement of cells. It also controls access to several other subsequent genes, imposing order on the developing embryo[2] (See Fig. 1 : a Drosophila embryo at the cellular blastoderm stage triple-labeled for three segmentation proteins including Kruppel (green) Hairy (red) and Giant (in blue)).
Fig.1 [3]
![[3]](http://www.bio.davidson.edu/courses/MolBio/fly/embryred.jpeg){kind=link}
See also Kruppel-like factors which have been recently investigated in the heart but are well characterised for their role in carcinogenesis.
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