How to query GRCh37 on Entrez and get a specific Chromosome?

Question

[bfeeny]

I want to be able to get Chromosomes for GRCh37. I know I can pull them using the RefSeq like so:

refseq="NC_000021.8"
fileFormat="fasta"
net_handle = Entrez.efetch(db="nucleotide", id=refseq, rettype=fileFormat, retmode="text")

But what if I do not know the RefSeq, but all I know is I want Chromosome 1, or Chromosome 2, etc from GRCh37? Is there someway I can pass in a RefSeq Assembly Accession, for example for GRCh37.13 its GCF_000001405.25, and also pass in a specific chromosome value? I tried using the [WORD] fields and a few others but I got no results returned.

[Pierre Lindenbaum]

duplicate of: Naming Chromosomes: From Ncbi Nc_0000Abc To Ucsc Chrabc

[bfeeny]

That doesn't help me. I realize the build has a GB assembly accession and RS assembly accession, but I don't see where I can use those. If I just query an Accession of say NC_000001* that returns GRCh38 (latest patch) by default. I don't see where there are any fields in the build that I can leverage to do the search, I have been playing with the Advanced Search form on the nucleotide database trying to use the [ALL] field to search for any unique identifiers with no luck.

[bfeeny]

If I try to use the assembly database (as opposed to nucleotide), it seems promising, I think perhaps that's where you were trying to lead me. However using that database, if I query NC_000001*[Accession] it only returns GRCh38 results! Even with that aside, I don't see how to drill down into the RefSeq via the search interface, since I have to manually click on the chromosome data. Any ideas?