Recombinant Human CLC/CNTFR alpha Chimera Protein

Catalog #: 2415-CR Datasheet / COA / SDS

Carrier Free

Catalog #	Availability	Size / Price	Qty
2415-CR-025/CF

With Carrier

Catalog #	Availability	Size / Price	Qty
2415-CR-025

R&D Systems Recombinant Proteins and Enzymes

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All CLC/CNTF R alpha Chimera Proteins and Enzymes

Product Details

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Summary Product Datasheets Carrier Free Data Images Reconstitution Calculator Background Related Research Areas

Recombinant Human CLC/CNTFR alpha Chimera Protein Summary

Product Specifications

Purity

>95%, by SDS-PAGE under reducing conditions and visualized by silver stain

Endotoxin Level

<0.01 EU per 1 μg of the protein by the LAL method.

Activity

Measured in a cell proliferation assay using TF-1 human erythroleukemic cells. Kitamura, T. et al. (1989) J. Cell Physiol. 140:323. The ED 50 for this effect is 10-25 ng/mL.

Source

Mouse myeloma cell line, NS0-derived human CLC/CNTF R alpha Chimera protein

Human CNTF R alpha (Gln23 - Pro346) Accession # P26992

GSGSSRGGSGSGGSGGGGSKL

Human CLC (Leu28 - Phe225) Accession # Q9UBD9

6-His tag

N-terminus

C-terminus

Accession #

Q9UBD9 (CLC) & P26992 (CNTF R alpha )

N-terminal Sequence
Analysis

No results obtained: Gln23 predicted

Predicted Molecular Mass

61 kDa

SDS-PAGE

85-93 kDa, reducing conditions

Product Datasheets

2415-CR (with carrier)

Product Datasheet

COA

SDS

2415-CR/CF (carrier free)

Product Datasheet

COA

SDS

Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

2415-CR

Formulation	Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein.
Reconstitution	Reconstitute at 100 μg/mL in sterile PBS containing at least 0.1% human or bovine serum albumin.
Shipping	The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage:	Use a manual defrost freezer and avoid repeated freeze-thaw cycles. 12 months from date of receipt, -20 to -70 degreesC as supplied. 1 month, 2 to 8 degreesC under sterile conditions after reconstitution. 3 months, -20 to -70 degreesC under sterile conditions after reconstitution.

2415-CR/CF

Formulation	Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution	Reconstitute at 100 μg/mL in sterile PBS.
Shipping	The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage:	Use a manual defrost freezer and avoid repeated freeze-thaw cycles. 12 months from date of receipt, -20 to -70 degreesC as supplied. 1 month, 2 to 8 degreesC under sterile conditions after reconstitution. 3 months, -20 to -70 degreesC under sterile conditions after reconstitution.

Reconstitution Calculator

Background: CLC/CNTF R alpha Chimera

Cardiotrophin-like cytokine (CLC), (also known as novel neurotrophin-1 (NNT-1) and B cell stimulating factor (BSF-3) is a 22 - 25 kDa member of the IL-6 family of cytokines (1 - 3). As such, it is expressed as a long, type I cytokine with four alpha -helices in its structure (2). Human CLC is synthesized as a 225 amino acid (aa) precursor that contains a 27 aa signal sequence and a 198 aa mature region. It contains one potential N-linked glycosylation site that is apparently utilized, and two distinct binding sites for Ciliary Neurotrophic Factor Receptor alpha (CNTF R alpha ) and Cytokine Receptor-like Factor (CLF) (4, 5). Although CLC has a signal sequence, it is not secreted unless noncovalently complexed to either CLF or soluble CNTF R alpha (5, 6). Once complexed, CLC signals through a tripartite receptor complex composed of gp130, LIF R beta and CNTF R alpha (5, 7). Within the IL-6 family, human CLC is most homologous to cardiotrophin-1, sharing approximately 29% amino acid sequence identity (8). Human to mouse, mature CLC shares 96% aa sequence identity. CLC is a trophic factor for motor neurons, a stimulator of ACTH release from corticotrophs, and an inducer of IgE synthesis and B cell proliferation (9 - 11). Cells known to express CLC include embryonic muscle, lung epithelium, and mesenchyme in various regions (12).

References