Product Details
Catalog Number: CH22116
Applications: ICC, WB, IHC, IF
Type: Chicken IgY
Immunogen: Full-length recombinant human protein
Format A: liquid
Species Reactivity: Human, Mouse, Rat
Downloads: Datasheet (pdf)
Product Sizes
SizeList PricePriceCart
100 ul$295.00Add to Cart

Calretinin is a member of the large superfamily of cytoplasmic Ca2+ binding proteins, thus belongs to the subclass of these containing the "EF hand" Ca2+ binding motif originally characterized in parvalbumin. Calretinin is expressed in mammalian central nerve system, testis, fallopian tube and pancreas. In the brain it is localized in certain classes of neurons, and antibodies to it are useful for identifying specific neuronal cell types. It is particularly concentrated in some cerebellar granular cells and their parallel fibers, but is also found in many GABAergic interneurons in the cortex. These GABAergic interneurons, in most cases, express only one of three Ca2+ binding proteins, namely calretinin, calbindin or parvalbumin . As a result, these important inhibitory interneurons can be identified and subclassified based on their content of these three proteins. Each type of neuron as defined in this fashion has particular electrophysiological and functional properties. For example, calbindin positive interneurons are not fast-spiking as are parvalbumin expressinginterneurons. Human calretinin is also known as 29 kDa calbindin and calbindin-2, for its sequence is related to calbindin.

Calretinin contains six EF-hand domains. Four of them bind Ca2+ with high affinity in a cooperative manner, one with low affinity and the last one is non-functional, without Ca2+-binding ability. The function of calretinin appears to be primarily buffering the Ca2+ level in cells and affect intracellular calcium signals. Calretinin deficiency in mossy cells of the dentate gyrus and granule cells results in abnormal excitability in the cerebellar neuronal network and impairment of long-term potentiation and motor coordination. The HGNC name for this protein is CALB2.

This antibody was raised against human calretinin protein expressed in and purified from E.coli. This antibody does not cross-react with the related calcium binding proteins calbindin and parvalbumin (see Blot image).

Product Reviews
Related Products
NameCatalog #
CalbindinCH22118
S100BGT15160
VAMP-1GT15236
CaMKII2AGT41019
Neurogranin precursorGT41024
Calcineurin AMO15055
Calbindin DMO15097
Synaptotagmin 1MO15099
CalbindinMO20016
CalretininMO20024
CalreticulinMO22164
Calretinin (IgG1)MO22165
CalretininMO22166
Cav1.2 Ca2+ channelMO50006
Cav1.3 Ca2+ channelMO50007
Cav3.1 Ca2+ channelMO50008
Bradykinin Receptor B2RA14137
CaMKIIRA18006
phospho-Synapsin (Ser9)RA18009
SynapsinRA18010
SHANK1a N-TerminusRA19015
SHANK1a C-terminusRA19016
MARCKS (Myristoylated Alanine Rich C Kinase Substrate)RA22111
StriatinRA25067
CADM1/SynCAMRA25084
Images

Adult rat brain hippocampus section (45 μM; fixed by transcardial perfusion with 4% paraformaldehyde) was stained with CH22116 (1:1,000, red), and our rabbit anti-MeCP2 (RA22123 green). Calretinin labels a subset of hippocampal interneurons, which also express MeCP2 in the nucleus to give a yellow color

Adult rat brain hippocampus section (45 μM; fixed by transcardial perfusion with 4% paraformaldehyde) was stained with CH22116 (1:1,000, red), and our rabbit anti-MeCP2 (RA22123 green). Calretinin labels a subset of hippocampal interneurons, which also express MeCP2 in the nucleus to give a yellow color

Adult rat cortex section was co-stained with Calretinin (CH22116; red) and our mouse anti-calbindin antibody (MO22146; green). Each antibody specifically labels a subset of interneurons (i.e., calretinin-positive or calbindin-postive) that express each marker exclusively. Insets are high-magnification images of the boxed area in each picture. Blue is Dapi staining that labels DNA.

Adult rat cortex section was co-stained with Calretinin (CH22116; red) and our mouse anti-calbindin antibody (MO22146; green). Each antibody specifically labels a subset of interneurons (i.e., calretinin-positive or calbindin-postive) that express each marker exclusively. Insets are high-magnification images of the boxed area in each picture. Blue is Dapi staining that labels DNA.