I encountered a paper which test an IL-6 polymorphism, but never clearly specifies it with an RSID, but simply calls it IL-6 -174:
I tried using online resources to find the exact chromosomal position and thus find the RSID that corresponds to position -174 of IL-6 gene, but I've found no matches at the location I calculated/found. Thus, I would prefer if someone checked my method and help me correct it.
1) What is -174 in reference to? Start of transcription, start of translation? Which position is that for IL-6 gene in GRCh38 or how does one find it exactly? ENSEMBL and Entrez data for the gene beginning differ, which is probably not uncommon.
2) Is there a resource that gives these alternative names so that one can use them as mapping?
3) Is such data likely to change with genome builds? IL-6 is at 7p21 in the paper, but in the current build it is in 7p15, adjacent to 7p21, if I am reading it correctly.
Thanks in advance!