LIF1005. Sigma-Aldrich.Leukemia Inhibitory Factor human-南京沃博生物科技有限公司

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LIF1005. Sigma-Aldrich.Leukemia Inhibitory Factor human

2023-05-05

产品详情

产品名称LIF1005. Sigma-Aldrich.Leukemia Inhibitory Factor human 查看相似产品 >

简介

Key Spec Table

Key Applications	Species	Source	Purity
CULT	Human	LIF is expressed in E. coli as a fusion protein with GST using the pGEX expression system, cleaved from GST moeity with thrombin and purified by HPLC chromatography.	Greater than 95% by analytical HPLC and SDS-PAGE. Endotoxin level is less than 0.1 ng per mg of LIF. Tested negative in both aseptic and microplasmic tests.

Description
Catalogue Number	LIF1005
Brand Family	Chemicon®
Trade Name	Chemicon
Description	Leukemia Inhibitory Factor human
Overview	Human LIF is a 19.7 kDa protein containing 181 amino acid residues. The non-glycosylated, E. coli expressed, recombinant human LIF is indistinguishable from native LIF in its biological activities in vitro. Human and murine mature LIF exhibit a 78% sequence identity at the amino acid control. Human LIF is equally active on both human and mouse cells. Murine LIF is approximately 1000 fold less active on human cells, than hLIF.
Alternate Names	LIF
Background Information	Leukemia Inhibitory Factor (LIF) is a lymphoid factor which promotes long-term maintenance of embryonic stem cells by suppressing spontaneous differentiation. LIF has a number of other activities including cholinergic neuron differentiation, control of stem cell pluripotency, bone and fat metabolism, mitogenesis of certain factor dependent cell lines and promotion of megakaryocyte production in vivo.

Product Information
Presentation	Liquid in PBS, pH 7.4 and 0.02% Tween 20. No preservativies added.
Quality Level	MQ300

Applications
Application	5 μg, human recombinant LIF protein, expressed in E. coli, suitable for stem cell culture
Key Applications	Cell Culture
Application Notes	RECOMMENDED QC PROTOCOL M1 Bioassay 1. The M1 bioassay is performed using in vitro semi-solid agar cultures, which contain approximately 100 cells in 1 mL volumes of DME containing 20 % FCS in 0.3% agar. 2. Add 100 μL of sample or hLIF (10(E4) units/mL in 5% FCS in isotonic saline) in two-fold serial dilutions in duplicate to 35 mm petri dishes. 3. Add 100 μL of 5% FCS in isotonic saline to two control slides. 4. Incubate at 37°C in fully humidified atmosphere of 10% CO2 in air for 7 days. 5. Score the number of colonies that show differentiation (note: 50 units is defined as the amount of activity which results in 50% of the colonies being differentiated). Manufactured by CHEMICON International, Inc. LIF is protected under US Patent nos. 5,443,825, 5,750,654 and 6,261,548, European Patent no. 0285 448 and related foreign patents and is not available for resale.

Biological Information
Concentration	10 μg/mL
Purity	Greater than 95% by analytical HPLC and SDS-PAGE. Endotoxin level is less than 0.1 ng per mg of LIF. Tested negative in both aseptic and microplasmic tests.
Source	LIF is expressed in E. coli as a fusion protein with GST using the pGEX expression system, cleaved from GST moeity with thrombin and purified by HPLC chromatography.
Specific Activity	The activity of human LIF is determined by the ability to induce differentiation of M1 myeloid leukemic cells. The minimum detectable concentration of human LIF in this assay is 0.5 ng/mL. The specific activity is >/=1 x 10(E8) units/mg, where 50 units is defined as the amount of human LIF required to induce differentiation in 50% of the M1 colonies in 1 mL agar cultures.
Entrez Gene Number	NM_002309.2
Entrez Gene Summary	Leukaemia inhibitory factor is a cytokine that induces macrophage differentiation. Neurotransmitters and neuropeptides, well known for their role in the communication between neurons, are also capable of activating monocytes and macrophages and inducing chemotaxis in immune cells. LIF signals through different receptors and transcription factors. LIF in conjunction with BMP2 acts in synergy on primary fetal neural progenitor cells to induce astrocytes.
Gene Symbol	LIF Emfilermin MLPLI HILDA D-FACTOR CDF
UniProt Number	P15018
UniProt Summary	FUNCTION: SwissProt: P15018 # LIF has the capacity to induce terminal differentiation in leukemic cells. Its activities include the induction of hematopoietic differentiation in normal and myeloid leukemia cells, the induction of neuronal cell differentiation, and the stimulation of acute-phase protein synthesis in hepatocytes. SIZE: 202 amino acids; 22008 Da SUBCELLULAR LOCATION: Secreted. SIMILARITY: SwissProt: P15018 ## Belongs to the LIF/OSM family.
Stem Cell Type	Human Embryonic Stem Cells Neural Stem Cells Hematopoietic Stem Cells Mesenchymal Stem Cells Induced Pluripotent Stem Cells

Product Usage Statements
Usage Statement	Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals. LABEL LICENSE - USE RESTRICTED TO RESEARCH USE ONLY Leukemia Inhibitory Factor ("LIF") is protected by US Patents No. 5,443,825 and 5,750,654 and Canada Patent No. 1,341,581 and 1,341,469 owned by AMRAD Corporation Ltd. and licensed exclusively to Millipore for research uses. The use of this product is limited for research uses only and not for any commercial purposes, such as making or developing other research products from this product or use of this product as a component in a research kit. This product is not to be used in humans or for any diagnostic purposes. The purchaser may refuse to accept the conditions of this label license by returning this product unopened and will receive a full refund of the purchase price paid. For-profit entities or commercial research entities purchasing this product shall be required to execute a separate commercial license with Millipore within three months of purchase. Researchers may not transfer this product or its derivatives to researchers performing commercial research at other Nonprofit Organizations, or to For-Profit Organizations, without the express written consent of Millipore, and without those entities having an express license from Millipore for the use of the product. Other than as specifically provided herein, a transferee of this product shall have no right to transfer this product, or its derivatives to any other person or entity.

Product Usage Statements

Usage Statement

Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.
LABEL LICENSE - USE RESTRICTED TO RESEARCH USE ONLY
Leukemia Inhibitory Factor ("LIF") is protected by US Patents No. 5,443,825 and 5,750,654 and Canada Patent No. 1,341,581 and 1,341,469 owned by AMRAD Corporation Ltd. and licensed exclusively to Millipore for research uses. The use of this product is limited for research uses only and not for any commercial purposes, such as making or developing other research products from this product or use of this product as a component in a research kit. This product is not to be used in humans or for any diagnostic purposes.
The purchaser may refuse to accept the conditions of this label license by returning this product unopened and will receive a full refund of the purchase price paid.
For-profit entities or commercial research entities purchasing this product shall be required to execute a separate commercial license with Millipore within three months of purchase. Researchers may not transfer this product or its derivatives to researchers performing commercial research at other Nonprofit Organizations, or to For-Profit Organizations, without the express written consent of Millipore, and without those entities having an express license from Millipore for the use of the product. Other than as specifically provided herein, a transferee of this product shall have no right to transfer this product, or its derivatives to any other person or entity.

Storage and Shipping Information
Storage Conditions	Maintain at 2-8°C for 6 - 12 months. Further dilutions should be made into buffer or medium to which protein (e.g., 1% BSA) or Tween 20 has been added. Manufactured by CHEMICON International, Inc. LIF is protected under US Patent nos. 5,187,077, 5,427,925, 5,443,825, 5,750,654 and 6,261,548, European Patent no. 0285 448 and related foreign patents and is not available for resale.

Packaging Information
Material Size	5 μg

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