Interrupted palindrome

Figure 21-4 Ni(II)-DtxR(C102D)-toxO Ternary complex [30]. Ni(II) ions are shown as spheres, fi-strands as arrows, and a-helices as ribbons. The orientation of the oligonucleotide is indicated with 3" and 5 , and the -10 regulatory regions as thick black lines. The center of the interrupted palindromic sequence is indicated by a star.

Occasionally Dennis would interrupt me to ask that I or Ev smoke a cigarette for him. Questioning uncovered his belief that in hyperspace the topology of all human bodies is continuous and so he could effortlessly absorb what he needed directly out of our bodies. For five days life went on in that mode, a waking dream of overkill by palindrome and pun. We sent amazingly few waves of interaction out into the "real world" around us. No one stopped to stare at us or our camp we seemed to have become invisible. The morning of the tenth of March changed that. 

Palindrome a nucleic acid sequence that is identical to its complementary strand (when both are read in the same 5 -3 direction). In the region of a P. there is therefore a twofold rotational symmetry. Perfect P, e.g. GAATTC, often occur as recognition sites for restriction enzymes. Imperfect palindromes, e.g. TACCrCTGGCGTGATA, often act as binding sites for proteins such as repressors. Interrupted P, e.g. GGTTXXXXXAACC, make possible the for-... 

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