Update README.md

README.md

@@ -57,6 +57,17 @@ This corpus covers three major layers of biological complexity:
 - **Prokaryotes** — bacteria and archaea. Simpler, denser genomes; genes are packed tightly with less non-coding "junk."
 - **mRNA** — the processed, spliced transcript of a gene. This is what actually gets translated into protein. Much shorter than full genomic sequences. Including mRNA teaches the model about gene structure without the noise of intergenic regions.
 
+DNA sequences in this corpus look like this:
+
+```
+ATGCTAGCTAGCTAGCTAGCTAGCTAGCTAGCTAGCTAGCTAGCTAGCTAGCTAGCTAGC
+```
+
+A 6-mer tokenizer, such as Carbon's, splits this into overlapping windows of 6 nucleotides:
+
+```
+ATGCTA | TGCTAG | GCTAGC | CTAGCT | TAGCTA | AGCTAG | ...
+```
 
 ## Loading the data