isoforms

isoforms

isomeric forms of the same protein, with slightly different amino acid sequences, but with the same activity.
References in periodicals archive ?
The content and composition of different vitamin E isoforms was analyzed in normal human skin.
Invertebrate trypsins have the characteristics of the Clan PA, family SlA, in common, although they exhibit some distinct features, such as apparent independence of calcium ions, activity toward native proteinaceous substrates, high number of isoforms, and poor stability at acid pH.
Now, however, there is no impediment to measuring C-peptide and proinsulin isoforms in mouse or rat samples.
Therefore the qualitative and quantitative composition of viscotoxin (VT) isoforms in different organs and the seasonal course of V.
VEGF exists in the mouse primarily as three isoforms, VEGF 120, 164, and 188, that differ in their ability to bind heparan sulfate proteoglycans on the cell surface and in the extracellular matrix.
In the search to understand these molecular processes, researchers uncovered an important new DAF-16 isoform - DAF-16d/f - that collaborates with other DAF-16 protein isoforms to regulate longevity.
This complexity is further complicated by the observation that the specific downstream effects of p38 MAPK activation depends not only on stimuli but also on cell types and perhaps also on various p38 MAPK isoforms involved.
In the present study, we first determined the basal gene expression levels of VEGF isoforms in the bovine mammary gland and then performed molecular cloning of these VEGF isoforms.
Based on the genomic breakpoint in PML gene, three different PML/RAR [alpha] isoforms are recognized: intron 3, intron 6 and exon 6 (1).
Three different isoforms (named ALFLv1, ALFLv2 and ALFLv3) are observed, based on three nucleotide differences that produce three changes in amino acid sequence (Val11Ala, Val12Ala, Arg83Lys).
Pegaptanib sodium (Macugen), which is currently approved for the treatment of macular degeneration, works by specifically blocking one of the six human isoforms of vascular endothelial growth factor (VEGF).
The MT-1 and MT-2 isoforms are most widely expressed, whereas MT-3 is largely brain-specific and MT-4 is located mainly in stratified squamous epithelia (Cherian et al.