5'... ATGCC|CCGTA ...3'
3'... TACGG|GGCAT ...5'
5'... AAGT|TGAA ...3'
3'... TTCA|ACTT ...5'
or in generalised way; on each strand;
Is there any terminology for such-sort of repeat? A sort of palindromic sequence? A sort of inverted repeat? or mirror-repeat? Does they really exist in nature? (I could not yet found any helpful answer in web, including wikipedia.)
5'... ATGCTTTC|GAAAGCAT ...3'
3'... TACGAAAG|CTTTCGTA ...5'
or in general;
5'... A B C D E F | M N P Q R S ...3'
3'... S R Q P N M | F E D C B A ...5'
Where on single-strand there is no symmetry when read (3'---> 5') and (5' ---> 3').
BUT I'm not telling like that. i'm telling about a situation where a reflection-symmetry present in each single strand when read (3'---> 5') or (5' ---> 3').
5'... A B C D E F | F E D C B A ...3'
3'... S R Q P N M | M N P Q R S ...5'
From no angle it is a palindromic-sequence because the symmetry is not between 2 opposite strand.
This question came to my mind when for first- time I'd taught about palindromic sequence. I was unable to "literally" match it with verbal palindromes like "AND MADAM DNA" . Rather it was looking to me like
I EAT CAKE
EKAC TAE I
So I thought, if really there exist any sequence literally like "AND MADAM DNA"... whatever if there is any terminology for it or not.
One other Q/A site mentions about a term "mirror repeat", with exact same situation as OP, but gave no reference and further biological importance.
Latest revision of Wikipedia also mentions a term mirror repeat and everted repeat, but no further explanation and hyperlink is given.
Another result from google search.