If I read a strand rather than the other I should obtain regardless the same protein, but I checked and the codons are not complementary. So if on a strand I have CGC (alanine) the other should code too for alanine but complementary GCG codes for arginine. Am I missing something?
In: Biology
On the DNA strand for any given gene, there is a strand that is “read” to generate mRNA, and a strand that is just there as a template for the other strand.
These aren’t always the same strand for different genes.
There are signals in the DNA around the gene that help the transcription proteins orient themselves correctly, so that only the correct strand is read.
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