Users might consider labeling strategies other than acidic reductive amination, e.g., PMP labeling, to reduce the risk of hydrolysis.
When healthcare facilities register alternative distribution sites with the CDU, PMPs are labelled seperately from those distributed from the healthcare facilities.
Next to fluorescence detection, RP-HPLC is often combined with online ESI-MS analysis, which has been shown for glycans labeled with various tags such as PMP, phenylhydrazine, and the biotin label BACH [ 55, 78, 181, 182].
Reaction mixtures contained 1 nM labeled pMP-bcr6 and 60 nM wild-type human topoisomerase IIα or 115 nM catalytic core in 50 μL of DNA cleavage buffer (containing 5 mM Ca2+) in the absence or presence of compounds.
Labeling reagents such as PMP [ 51, 52] or its methoxy analog 1- p-methoxy -phenyl-3-methyl-5-pyrazolone are most often applied [ 53].
The labelling for mucin in PMP cultures was associated with both the grape-like cell colonies and most of the fibroblastic-like cells.
At first only few Pmp proteins could be detected by TID labelling or immunofluorescence of formalin fixed EBs in the chlamydial outer membrane, but the authors of these studies stated that this is likely due to insufficient amounts of proteins to be detected or failure of surface epitope recognition by the antibodies in the respective essay [ 52, 53].
A comparative study analyzing PMP- and ANTS-labeled glycans was performed by Saba et al. [ 78], where the ANTS labeling was accomplished by reductive amination.
In the open-label phase, all patients received almotriptan for the first PMP migraine in their third and fourth menstrual cycles.
Labeling of the reducing end of glycans with reagents such as 1-phenyl-3-methyl-5-pyrazolone (PMP) by Michael addition is performed under alkaline conditions [ 50], thereby avoiding the considerable risk of loss of sialic acids under acidic conditions which is intrinsic to reductive amination reactions (see earlier).
