This NT-amino acid-specific feature permits the development of a tandem peptide ligation method employing three unprotected peptide segments containing different NT-amino acids to form consecutively two amide bonds, an Xaa-SPro (thiaproline) and then an Xaa-Cys.
Because of its exquisite chemoselectivity, NCL can be performed with unprotected peptide segments in water.
The full-length [1-86] Tat protein is synthesized using the native chemical ligation (NCL) method initially introduced by Dawson et al. The reaction is performed between two fully unprotected peptides, the N-terminal segment having a C-terminus thioester and the C-terminal segment having an N-terminus cysteine residue.
7 9 Indeed, the diagnostic accuracy of graft segments is good, but patients with CABG have a high prevalence of severe calcifications and stented segments in the native coronary arteries, leading to some overestimation of stenosis of the distal run-off segments of the protected coronary arteries and unprotected native coronary arteries including stented segments.
For example, a network segment has been left unprotected, a data element has accidentally revealed or a system has been left unpatched.
Women in low-wage jobs are least likely to have any paid sick, personal or vacation time at all, leaving one of the most vulnerable segments of our workforce unprotected.
If a large enough segment of the population is unprotected from a disease — generally considered 5 percent to 15 percent, depending on the disease — even people with some degree of immunity through vaccination can have an elevated risk, she said.
Yet our workforce will remain weakened as long as a large segment of the labor market is unprotected.
NCL of the middle segment, still N-α-Fmoc protected, with the unprotected C-terminal portion took advantage of Cys96, which naturally occurs in some isoforms of H3.
The error protection of service advertisements in WBC is an important issue since even a single bit error (in an unprotected message) may result in failure to decode a particular WBC data segment [11].
