Human influenza hemagglutinin <unk>  is a surface glycoprotein required for the infectivity of the human influenza virus. The<unk>  is derived from the<unk> -molecule corresponding to amino acids 98-106. It<unk> s been extensively used as a general epitope tag in expression vectors. Many recombinant proteins<unk> ve been engineered to express the<unk> , which does not appear to interfere with the bioactivity or the biodistribution of the recombinant protein. This tag facilitates the detection, isolation, and purification of the protein of interest. The<unk>  is not suitable for detection or purification of proteins from apoptotic cells since it is cleaved by Caspase-3 and / or Caspase-7 after its sequence DVPD, causing it to lose its immunoreactivity. Labeling of endogenous proteins with<unk>  using CRISPR was recently accomplished in-vivo in differentiated neurons.
HA-tag
Triage tag
Kozak consensus sequence
Insertion sequence
WAIFW matrix
MChip
Replicon 
Cis-regulatory element