APOA4 resides on chromosome 11 in close linkage to APOA1 and APOC3.
APOA4 contains 3 exons separated by two introns, and is polymorphic, although most of the reported sequence polymorphisms occur in exon 3.
The best validated and studied non-synonymous SNPs are a glutamine=> histidine substitution at codon 380 and a threonine=> serine substitution at codon 367; a sequence polymorphism has also been identified in the 3'UTR of the third exon.
Intra-species comparative gene sequence analysis suggests that the APOA4 gene arose from APOA1 by gene duplication approximately 270 MYA.
The primary translation product of the APOA4 gene is a 396-residue preprotein, which undergoes proteolytic processing to yield apo A-IV, a 376-reside mature O-linked glycoprotein.
Applications:Suitable for use in ELISA, Western Blot, Immunohistochemistry, Immunocytochemistry.
Other applications not tested.
Recommended Dilution:ELISA: 1:100-1:5000 Western Blot: 1:50-400Immunohistochemistry (frozen): 1:50-500Immunohistochemistry (paraffin): 1:10-100Immunocytochemistry: 1:50-500Optimal dilutions to be determined by the researcher.