GlyCLICK AlexaFluor555


GlyCLICK AlexaFluor555 enables site-specific labeling of IgG with AlexaFluor®555

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GlyCLICK AlexaFluor555 is a kit that contains all reagents needed for site-specific conjugation of IgG using AlexaFluor®555. Spin columns with GlycINATOR (EndoS2) enzyme immobilized on agarose beads deglycosylates IgG from several species and subclasses by hydrolyzing any Fc glycoform after the inner most GlcNAc. The GalT enzyme supplied in solution enables incorporation of the UDP-GalNAz regent to the exposed GlcNAc sugar for subsequent click chemistry incorporating the AlexaFluor®555 label. GlyCLICK AlexaFluor555 is available in kit formats to facilitate labeling of 250 ug or 2 mg of IgG.

Detailed Information


Antibody Conjugation, Immunofluoresence Microscopy, Flow Cytometry

Product Group



Cloned from S. pyogenes, Produced in E. coli (His-tagged), Engineered b-1,4-galactosyltransferase (Y289L)

Product Composition

Enzymatic components: Immobilized GlycINATOR (EndoS2) on agarose beads (20% EtOH), beta-1,4-galactosyltransferase (GalT)

Digestion Site

IgG Fc-glycans


GlycINATOR hydrolyzes Beta-1,4-linked GlcNAc residues on all IgG Fc-glycoforms for site-specific azide activation using GalT and complete labeling using SPAAC


Human IgG1, Human IgG2, Human IgG3, Human IgG4, Cow IgG, Fc-fusion proteins, Goat IgG, Horse IgG, Monkey IgG, Mouse IgG, Rabbit IgG, Rat IgG, Sheep IgG

Reaction Conditions

Deglycosylation (GlycINATOR): 30 min incubation at 37°C, Azide Activation (GalT): O/N incubation at 30°C, Labeling (SPAAC): O/N incubation at 25°C, *The protocol can vary depending on kit size/amount of IgG

Digestion Buffers

TBS (pH 7.4)

Buffer Compatibility

GlyCLICK steps are performed in TBS buffer, provided in the kit., For purification of azide activated Ab, TBS or PBS can be used., Sodium azide interferes with the click reaction and must be avoided., Avoid phophate buffers, not compatible with buffer additive (precipitation).


GalT requires buffer additive for activity., Buffer additive is included in the GlyCLICK kit.


Denaturated IgG

Unit Definition

Components for antibody conjugation of up to 0.25-2 mg IgG


AlexaFluor 555

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