AAT Bioquest

XFD350 Goat Anti-human IgG (H+L) Antibody *XFD350 Same Structure to Alexa Fluor™ 350*

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Physical properties
Molecular weight~150000
Spectral properties
Correction Factor (260 nm)0.25
Correction Factor (280 nm)0.19
Extinction coefficient (cm -1 M -1)19000
Excitation (nm)343
Emission (nm)441
Storage, safety and handling
H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22
StorageFreeze (< -15 °C); Minimize light exposure


Other names
Flow Cytometry (FACS); ELISA; IHC; Western Blot
Molecular weight
Correction Factor (260 nm)
Correction Factor (280 nm)
Extinction coefficient (cm -1 M -1)
Excitation (nm)
Emission (nm)
AAT Bioquest's anti-human secondary antibodies have well-characterized specificity for human immunoglobulins and are useful in the detection, sorting or purification of its specified target. This Alexa Fluor® 350-labeled secondary antibody was prepared using AAT Bioquest's proprietary labeling technology. It demonstrated much brighter signal compared to the similar Alexa Fluor® 350 goat anti-human IgG antibodies from other commercial sources, and thus can significantly increase assay sensitivities. Secondary antibodies offer increased versatility enabling users to use many detection systems (e.g. HRP, AP, fluorescence). They can also provide greater sensitivity through signal amplification as multiple secondary antibodies can bind to a single primary antibody. This antibody was purified through affinity chromatography and conjugated to XFD350 (ex/em = 343/441 nm). XFD350 is manufactured by AAT Bioquest, and it has the same chemical structure of Alexa Fluor® 350 (Alexa Fluor® is the trademark of ThermoFisher). It is compatible with the 355 nm laser and 450/50 nm bandpass filter (for example, as in the BD LSRFortessa™ Cell Analyzer).


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Spectral properties

Correction Factor (260 nm)0.25
Correction Factor (280 nm)0.19
Extinction coefficient (cm -1 M -1)19000
Excitation (nm)343
Emission (nm)441


We provide custom conjugation services for this antibody (eg. labeling of IgG antibody with HRP). A list of available labels can be found in the table below:

AFAF350, AF488, AF555, AF594, AF647, AF680, AF700, AF750
ProteinsHRP, Alkaline Phosphatase, Streptavidin
TandemsAPC, APC/Cy7, APC/AF750, APC/iFluor™ 700, APC/iFluor™ 750, PE, PE/Cy5, PE/Cy7, PE/AF610, PE/AF700, PE/iFluor™ 594, PE/iFluor™ 647, PE/iFluor™ 700, PE/iFluor™ 750, PE/Texas Red®, PerCP, PerCP/Cy5.5
Small MoleculesBiotin
Traditional DyesFITC (fluorescein), TRITC, PacBlue, PacOrange, Cy3, Cy5
iFluor350, 405, 430, 450, 488, 514, 532, 546, 555, 560, 568, 594, 610, 633, 647, 660, 670, 680, 700, 710, 750, 790, 800, 810, 820, 840, 860, A7
mFluorUV375, UV460, Violet 450, Violet 500, Violet 510, Violet 540, Blue 570, Green 620, Red 700, Red 780

For additional information about custom conjugations, please consult our services page here.