"' Octreotide "'( brand name "'Sandostatin "', octapeptide that mimics natural somatostatin pharmacologically, though it is a more potent inhibitor of growth hormone, glucagon, and insulin than the natural hormone.
12.
The biologically active form of oxytocin, commonly measured by HPLC techniques, is also known as the octapeptide " oxytocin disulfide " ( oxidized form ), but oxytocin also exists as a reduced straight-chain ( non-cyclic ) dithiol nonapeptide called oxytoceine.
13.
Moroidin, a bicyclic octapeptide containing an unusual C-N linkage between tryptophan and histidine, was first isolated from the leaves and stalks of " Dendrocnide moroides ", and subsequently shown to be the principal compound responsible for the long duration of the stings.
14.
Some mutations involve expansion of the octapeptide repeat region at the N-terminal of PrP . Other mutations that have been identified as a cause of inherited prion disease occur at positions 102, 117 & 198 ( GSS ), 178, 200, 210 & 232 ( CJD ) and 178 ( Fatal Familial Insomnia, FFI ).
