isoform
noun
iso·form
ˈī-sə-ˌfȯrm 
: any of two or more functionally similar proteins that have a similar but not an identical amino acid sequence
Examples of isoform in a Sentence
Recent Examples on the Web
Thisstudy cannot fully determine that point, however, in part because the methods used do not discriminate between fetal tau and other isoforms—more research will be needed to explore that possibility.
—
Robert Martone, Scientific American, 10 Oct. 2025
Some genes showed a shift in isoform usage (using different versions of the same gene), especially Homer1.
—New Atlas, 16 Aug. 2025
Lowers Heart Disease Risk Blackberries are packed with heart-protective compounds like fiber, isoform, and anthocyanins.
—Julie Marks, Verywell Health, 17 June 2025
The tau gene produces six distinct isoforms, or versions, of the protein based on how the protein sequence is cut.
—William A. Haseltine, Forbes, 25 Oct. 2024
Vitamin E has eight different isoforms, or types, and each may do slightly different things in our bodies.
—Cosby Stone, The Conversation, 22 Nov. 2019
To be declared positive, a certain percentage of the resulting isoforms have to appear in a certain range, and that range is down, somewhat, to interpretation.
—Joe Lindsey, Outside Online, 3 July 2018
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Robert Martone, Scientific American, 10 Oct. 2025
Some genes showed a shift in isoform usage (using different versions of the same gene), especially Homer1.
—New Atlas, 16 Aug. 2025
Lowers Heart Disease Risk Blackberries are packed with heart-protective compounds like fiber, isoform, and anthocyanins.
—Julie Marks, Verywell Health, 17 June 2025
The tau gene produces six distinct isoforms, or versions, of the protein based on how the protein sequence is cut.
—William A. Haseltine, Forbes, 25 Oct. 2024
Vitamin E has eight different isoforms, or types, and each may do slightly different things in our bodies.
—Cosby Stone, The Conversation, 22 Nov. 2019
To be declared positive, a certain percentage of the resulting isoforms have to appear in a certain range, and that range is down, somewhat, to interpretation.
—Joe Lindsey, Outside Online, 3 July 2018
Cite this Entry
“Isoform.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/isoform. Accessed 3 Nov. 2025.
Copy CitationMedical Definition
isoform
noun
iso·form
ˈī-sə-ˌfȯrm
: any of two or more functionally similar proteins that have a similar but not identical amino acid sequence and are either encoded by different genes or by RNA transcripts from the same gene which have had different exons removed
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