## Abstract The seed oils of three Maytenus species have been examined by high temperature GLC using SOP‐50 (methoxy‐terminated) and OV‐225‐OH (OH‐terminated) glasscapillary columns. The main compounds (71–76%) could be identified as α‐mono‐acetotriacylglycerols by a combination of high temperature
Differentiation of α- from γ-glutamyl dipeptides by chemical ionization mass spectrometry
✍ Scribed by Herbert T. Nagasawa; Sanne D. J. Magnan; Rodger L. Foltz
- Publisher
- John Wiley and Sons
- Year
- 1982
- Tongue
- English
- Weight
- 428 KB
- Volume
- 9
- Category
- Article
- ISSN
- 1076-5174
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A fast atom bombardment/collisional activation/linked-scan at constant B/E (tandem mass spectrometric) method is described which can distinguish between a-and basparty1 and a-and y-glutamyl underivatized peptides. The method is based upon differences in loss of CO from aspartyl or glutamyl B-fragmen
## Abstract A new series of Boc‐N‐β^3^, γ^4^‐/γ^4^, β^3^‐isomeric hybrid peptides (containing repeats of β^3^‐Caa and γ^4^‐Caa's, Caa = C‐linked carbo β^3^‐/γ^4^‐amino acids derived from D‐xylose) have been differentiated by both positive and negative ion electrospray ionization (ESI) ion‐trap and
## Abstract Four pairs of positional isomers of ureidopeptides, FmocNH‐CH(R~1~)‐φ(NH‐CO‐NH)‐CH(R~2~)‐OY and FmocNH‐CH(R~2~)‐φ(NH‐CO‐NH)‐CH(R~1~)‐OY (Fmoc = [(9‐fluorenyl methyl)oxy]carbonyl; R~1~ = H, alkyl; R~2~ = alkyl, H and Y = CH~3~/H), have been characterized and differentiated by both positi