Product Name:	Human Spectrin alpha chain, brain (SPTAN1) ELISA Kit
SKU:	HUEB0555
Size:	96T
Target:	Human Spectrin alpha chain, brain (SPTAN1)
Synonyms:	Alpha-II spectrin, Fodrin alpha chain, Spectrin, non-erythroid alpha chain, SPTA2
Assay Type:	Sandwich
Detection Method:	ELISA
Reactivity:	Human
Detection Range:	0.312-20ng/ml
Sensitivity:	0.18ng/mL

Intra CV:

5.9%

Inter CV:

9.1%

Linearity:

Sample	1:2	1:4	1:8	1:16
Serum(N=5)	112-112%	100-109%	104-116%	109-118%
EDTA Plasma(N=5)	101-111%	105-115%	95-104%	103-113%
Heparin Plasma(N=5)	108-117%	115-124%	104-117%	108-118%

Recovery:

Sample Type	Average(%)	Recovery Range(%)
Serum	97	91-103
Plasma	99	93-105

Function:

Fodrin, which seems to be involved in secretion, interacts with calmodulin in a calcium-dependent manner and is thus candidate for the calcium-dependent movement of the cytoskeleton at the membrane.

Uniprot:	Q13813
Sample Type:	Serum, plasma, tissue homogenates, cell culture supernates and other biological fluids
Specificity:	Natural and recombinant human Spectrin alpha chain, brain
Sub Unit:	Like erythrocyte spectrin, the spectrin-like proteins are capable of forming dimers which can further associate to tetramers. Interacts with isoform 1 of ACP1. Interacts with CALM and EMD. Interacts (via C-terminal spectrin repeats) with TRPC4. Identified in a complex with ACTN4, CASK, IQGAP1, MAGI2, NPHS1 and SPTBN1.
Subcellular Location:	Cytoplasm cytoskeleton Cytoplasm cell cortex Expressed along the cell membrane in podocytes and presumptive tubule cells during glomerulogenesis and is expressed along lateral cell margins in tubule cells.
Storage:	Please see kit components below for exact storage details
Note:	For research use only

UniProt Protein Function:	SPTAN1: a cytoskeletal protein which seems to be involved in secretion, interacts with calmodulin in a calcium-dependent manner and is thus candidate for the calcium-dependent movement of the cytoskeleton at the membrane. Capable to forming dimers which can further associate to tetramers.
UniProt Protein Details:	Protein type:Cytoskeletal; Motility/polarity/chemotaxis; Adaptor/scaffold Chromosomal Location of Human Ortholog: 9q34.11 Cellular Component: cytosol; fascia adherens; intracellular membrane-bound organelle; lateral plasma membrane; membrane; microtubule cytoskeleton; protein complex; spectrin; Z disc Molecular Function:actin binding; calcium ion binding; calmodulin binding; protein binding; protein complex binding; protein heterodimerization activity; protein N-terminus binding; structural constituent of cytoskeleton; syntaxin binding Biological Process: actin cytoskeleton reorganization; actin filament capping; activation of MAPKK activity; apoptosis; axon guidance; cell structure disassembly during apoptosis; cellular protein metabolic process; epidermal growth factor receptor signaling pathway; ER to Golgi vesicle-mediated transport; fibroblast growth factor receptor signaling pathway; innate immune response; insulin receptor signaling pathway; MAPKKK cascade; nerve growth factor receptor signaling pathway; post-translational protein modification; programmed cell death; protein amino acid N-linked glycosylation via asparagine; Ras protein signal transduction; small GTPase mediated signal transduction; vascular endothelial growth factor receptor signaling pathway Disease: Epileptic Encephalopathy, Early Infantile, 5
NCBI Summary:	Spectrins are a family of filamentous cytoskeletal proteins that function as essential scaffold proteins that stabilize the plasma membrane and organize intracellular organelles. Spectrins are composed of alpha and beta dimers that associate to form tetramers linked in a head-to-head arrangement. This gene encodes an alpha spectrin that is specifically expressed in nonerythrocytic cells. The encoded protein has been implicated in other cellular functions including DNA repair and cell cycle regulation. Mutations in this gene are the cause of early infantile epileptic encephalopathy-5. Alternate splicing results in multiple transcript variants.[provided by RefSeq, Sep 2010]
UniProt Code:	Q13813
NCBI GenInfo Identifier:	94730425
NCBI Gene ID:	6709
NCBI Accession:	Q13813.3
UniProt Secondary Accession:	Q13813,Q13186, Q15324, Q16606, Q59EF1, Q5VXV5, Q5VXV6 Q7Z6M5, Q9P0V0,
UniProt Related Accession:	Q13813
Molecular Weight:	282,282 Da
NCBI Full Name:	Spectrin alpha chain, non-erythrocytic 1
NCBI Synonym Full Names:	spectrin alpha, non-erythrocytic 1
NCBI Official Symbol:	SPTAN1
NCBI Official Synonym Symbols:	NEAS; EIEE5; SPTA2
NCBI Protein Information:	spectrin alpha chain, non-erythrocytic 1
UniProt Protein Name:	Spectrin alpha chain, non-erythrocytic 1
UniProt Synonym Protein Names:	Alpha-II spectrin; Fodrin alpha chain; Spectrin, non-erythroid alpha subunit
Protein Family:	Spectrin
UniProt Gene Name:	SPTAN1
UniProt Entry Name:	SPTN1_HUMAN

Component	Quantity (96 Assays)	Storage
ELISA Microplate (Dismountable)	8×12 strips	-20°C
Lyophilized Standard	2	-20°C
Sample Diluent	20ml	-20°C
Assay Diluent A	10mL	-20°C
Assay Diluent B	10mL	-20°C
Detection Reagent A	120µL	-20°C
Detection Reagent B	120µL	-20°C
Wash Buffer	30mL	4°C
Substrate	10mL	4°C
Stop Solution	10mL	4°C
Plate Sealer	5	-

Other materials and equipment required:

Microplate reader with 450 nm wavelength filter
Multichannel Pipette, Pipette, microcentrifuge tubes and disposable pipette tips
Incubator
Deionized or distilled water
Absorbent paper
Buffer resevoir

*Note: The below protocol is a sample protocol. Protocols are specific to each batch/lot. For the correct instructions please follow the protocol included in your kit.

Allow all reagents to reach room temperature (Please do not dissolve the reagents at 37°C directly). All the reagents should be mixed thoroughly by gently swirling before pipetting. Avoid foaming. Keep appropriate numbers of strips for 1 experiment and remove extra strips from microtiter plate. Removed strips should be resealed and stored at -20°C until the kits expiry date. Prepare all reagents, working standards and samples as directed in the previous sections. Please predict the concentration before assaying. If values for these are not within the range of the standard curve, users must determine the optimal sample dilutions for their experiments. We recommend running all samples in duplicate.

Step
1.	Add Sample: Add 100µL of Standard, Blank, or Sample per well. The blank well is added with Sample diluent. Solutions are added to the bottom of micro ELISA plate well, avoid inside wall touching and foaming as possible. Mix it gently. Cover the plate with sealer we provided. Incubate for 120 minutes at 37°C.
2.	Remove the liquid from each well, don't wash. Add 100µL of Detection Reagent A working solution to each well. Cover with the Plate sealer. Gently tap the plate to ensure thorough mixing. Incubate for 1 hour at 37°C. Note: if Detection Reagent A appears cloudy warm to room temperature until solution is uniform.
3.	Aspirate each well and wash, repeating the process three times. Wash by filling each well with Wash Buffer (approximately 400µL) (a squirt bottle, multi-channel pipette,manifold dispenser or automated washer are needed). Complete removal of liquid at each step is essential. After the last wash, completely remove remaining Wash Buffer by aspirating or decanting. Invert the plate and pat it against thick clean absorbent paper.
4.	Add 100µL of Detection Reagent B working solution to each well. Cover with the Plate sealer. Incubate for 60 minutes at 37°C.
5.	Repeat the wash process for five times as conducted in step 3.
6.	Add 90µL of Substrate Solution to each well. Cover with a new Plate sealer and incubate for 10-20 minutes at 37°C. Protect the plate from light. The reaction time can be shortened or extended according to the actual color change, but this should not exceed more than 30 minutes. When apparent gradient appears in standard wells, user should terminatethe reaction.
7.	Add 50µL of Stop Solution to each well. If color change does not appear uniform, gently tap the plate to ensure thorough mixing.
8.	Determine the optical density (OD value) of each well at once, using a micro-plate reader set to 450 nm. User should open the micro-plate reader in advance, preheat the instrument, and set the testing parameters.
9.	After experiment, store all reagents according to the specified storage temperature respectively until their expiry.

When carrying out an ELISA assay it is important to prepare your samples in order to achieve the best possible results. Below we have a list of procedures for the preparation of samples for different sample types.

Sample Type	Protocol
Serum	If using serum separator tubes, allow samples to clot for 30 minutes at room temperature. Centrifuge for 10 minutes at 1,000x g. Collect the serum fraction and assay promptly or aliquot and store the samples at -80°C. Avoid multiple freeze-thaw cycles. If serum separator tubes are not being used, allow samples to clot overnight at 2-8°C. Centrifuge for 10 minutes at 1,000x g. Remove serum and assay promptly or aliquot and store the samples at -80°C. Avoid multiple freeze-thaw cycles.
Plasma	Collect plasma using EDTA or heparin as an anticoagulant. Centrifuge samples at 4°C for 15 mins at 1000 × g within 30 mins of collection. Collect the plasma fraction and assay promptly or aliquot and store the samples at -80°C. Avoid multiple freeze-thaw cycles. Note: Over haemolysed samples are not suitable for use with this kit.
Urine & Cerebrospinal Fluid	Collect the urine (mid-stream) in a sterile container, centrifuge for 20 mins at 2000-3000 rpm. Remove supernatant and assay immediately. If any precipitation is detected, repeat the centrifugation step. A similar protocol can be used for cerebrospinal fluid.
Cell culture supernatant	Collect the cell culture media by pipette, followed by centrifugation at 4°C for 20 mins at 1500 rpm. Collect the clear supernatant and assay immediately.
Cell lysates	Solubilize cells in lysis buffer and allow to sit on ice for 30 minutes. Centrifuge tubes at 14,000 x g for 5 minutes to remove insoluble material. Aliquot the supernatant into a new tube and discard the remaining whole cell extract. Quantify total protein concentration using a total protein assay. Assay immediately or aliquot and store at ≤ -20 °C.
Tissue homogenates	The preparation of tissue homogenates will vary depending upon tissue type. Rinse tissue with 1X PBS to remove excess blood & homogenize in 20ml of 1X PBS (including protease inhibitors) and store overnight at ≤ -20°C. Two freeze-thaw cycles are required to break the cell membranes. To further disrupt the cell membranes you can sonicate the samples. Centrifuge homogenates for 5 mins at 5000xg. Remove the supernatant and assay immediately or aliquot and store at -20°C or -80°C.
Tissue lysates	Rinse tissue with PBS, cut into 1-2 mm pieces, and homogenize with a tissue homogenizer in PBS. Add an equal volume of RIPA buffer containing protease inhibitors and lyse tissues at room temperature for 30 minutes with gentle agitation. Centrifuge to remove debris. Quantify total protein concentration using a total protein assay. Assay immediately or aliquot and store at ≤ -20 °C.
Breast Milk	Collect milk samples and centrifuge at 10,000 x g for 60 min at 4°C. Aliquot the supernatant and assay. For long term use, store samples at -80°C. Minimize freeze/thaw cycles.