Isoform

noun

1. Any of the chemically distinct forms of a protein that perform the same biochemical function, although often at different rates.
2. Same as <internalXref urlencoded="p-iodoxyanisol">p-iodoxyanisol</internalXref>, CH₃OC₆H₄IO₂.
3. An antiseptic powder composed of equal parts of iodoxyanisol and calcium phosphate.
4. Any of several different forms of the same <xref>protein</xref>, arising from either single nucleotide polymorphisms, differential splicing of <xref>mRNA</xref>, or post-translational modifications (e.g. <xref>sulfation</xref>, <xref>glycosylation</xref>, etc.)