The application describes a one-pot process for releasing and labelling 0-glycans from glycoproteins, thereby facilitating analysis via LC-ESl-MS-MS. The process comprises contacting the glycoprotein with an amine, eg. methylamine, dimethylamine, or ammonia, NH3 in the presence of a labelling agent, especially 1-phenyl-3-methyl-5-pyrazolone (PMP; CAS Reg. No. 89-25-8), 1-naphthyl-3-methyl-5-pyrazolone (NM P) or 1-(4-methoxy)phenyl-3-methyl-5-pyrazolone (PMPMP, CAS Reg. No. 60798-06-3).
本申请介绍了一种从糖蛋白中释放和标记 0-聚糖的一步法工艺,从而便于通过 LC-ESl-MS-MS 进行分析。该工艺包括在标记剂,特别是 1-苯基-3-甲基-5-
吡唑啉酮(
PMP;CAS 注册号
89-25-8)、1-
萘基-3-甲基-5-
吡唑啉酮(NM P)或
1-(4-甲氧基)苯基-3-甲基-5-吡唑啉酮(
PMPMP,CAS 注册号
60798-06-3)存在的情况下,将糖蛋白与胺(如
甲胺、
二甲胺或
氨、NH3)接触。