After a search on the NCBI database, I found only the record for APOE precursor, APOE2 and APOE3 sequences. I am looking for any information regarding the E4 isoform (i.e. APOE4) sequence and if there are any known records about it.

I would expect a positive answer as APOE4 is a famous polymorph at least to the Alzheimer's disease research circle.

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