Suited for multiplex fluorescence microscopy, flow cytometry and related fluorescence-based applications. The large Stokes shift facilitates spectral separation, while the preservative-free formulation minimizes interference in sensitive assay conditions.
ATTO-labeled secondary antibodies combine high fluorescence intensity with strong photostability and reliable performance in fluorescence-based detection. Donkey Anti-Goat IgG (H+L) ATTO490LS is designed for the detection of goat primary antibodies and is particularly useful when a large Stokes shift is required for multiplex fluorescence experiments.
ATTO490LS has an absorption maximum at 495 nm and a fluorescence-emission maximum at 658 nm in PBS, corresponding to a Stokes shift of approximately 165 nm. The wide separation between excitation and emission reduces spectral overlap and can support multiplex combinations with green-emitting fluorophores such as ATTO488 or ATTO514.
The antibody is supplied without preservatives. After conjugation, free dye is removed by gel filtration to minimize background fluorescence and support reproducible staining performance.
Specification
Immunofluorescence: 1:500–1:1500, Degree of Labeling (DOL): 2–5, Unbound dye ≤5% of total fluorescence.
Optical properties
λabs: 495 nm, λfl: 658 nm
Properties
Form
Lyophilized
Nominal concentration
2 mg/ml (after reconstitution with buffer)
The antibody is supplied as 1.0 mg lyophilized powder and shipped at ambient temperature. A glycerol buffer is included for reconstitution to 2 mg/ml. After reconstitution, the glycerol stock may be stored at -20°C without freezing. Avoid repeated freeze/thaw cycles.
Content
1.0 mg Donkey Anti-Goat IgG (H+L) ATTO490LS
1.0 ml Glycerol buffer (add 0.5 ml to reconstitute the lyophilized antibody)
Buffer: 50% glycerol, 0.01 M sodium phosphate, 0.1 M sodium chloride, pH 7.4
Clonality
Polyclonal
Isotype
IgG
Purification notes
Affinity purification removed donkey serum proteins and immunoglobulins not specifically binding to goat IgG. Following conjugation to ATTO490LS, the antibody was further purified by gel filtration to remove unconjugated dye and low-molecular-weight reaction components.
Hypermol® secondary antibodies are highly specific and purified to remove unbound dye, minimizing background signal.
Storage instructions
Store as glycerol stock at -20°C. Avoid repeated freeze/thaw cycles.
Shipping conditions
Shipped at ambient temperature.
Remarks
For research use only. Not for diagnostic, therapeutic, clinical or in vivo use.
Buffers and antibodies from Hypermol® are made of the purest reagents in Milli-Q™ water, as described in our publications.