Guanidination of the e e-amino group of lysine-terminated tryptic peptides can be accomplished selectively in one step with O-methylisourea hydrogen sulfate. This reaction converts lysine residues into more basic homoarginine residues. It also protects the e e-amino groups against unwanted reaction
Laser-Induced Thermal Desorption Facilitates Postsource Decay of Peptide Ions
โ Scribed by Shin Hye Kim; Aera Lee; Jae Yong Song; Sang Yun Han
- Book ID
- 113110726
- Publisher
- Elsevier Science
- Year
- 2012
- Tongue
- English
- Weight
- 377 KB
- Volume
- 23
- Category
- Article
- ISSN
- 1044-0305
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
A method for deflecting ions, such as K+, produced outside a Fourier-transform mass spectrometer cell during laser-induced thermal desorption, is described. This technique has been shown to deflect laser-generated K and Ti ions from two Ti foil samples (biomedical implant model surfaces), yielding m
## Abstract Fragmentation reactions of sodiumโcationized enkephalin peptides generated by matrixโassisted laser desorption/ionization were studied using postโsource decay (PSD) with a reflectron timeโofโflight mass spectrometer. Several matrices and analyteโmatrix sample preparation methods were ev