SPARC Polyclonal antibody

SPARC Polyclonal Antibody for IHC, WB,ELISA

Host / Isotype

Rabbit / IgG


human, mouse, rat, pig and More (2)





Cat no : 15274-1-AP


Basement membrane protein 40, BM 40, ON, Osteonectin, SPARC

Tested Applications

Positive WB detected inROS1728 cells, human testis tissue, A375 cells, human placenta tissue
Positive IHC detected inhuman stomach cancer tissue
Note: suggested antigen retrieval with TE buffer pH 9.0; (*) Alternatively, antigen retrieval may be performed with citrate buffer pH 6.0

Recommended dilution

Western Blot (WB)WB : 1:500-1:1000
Immunohistochemistry (IHC)IHC : 1:1000-1:4000
Sample-dependent, check data in validation data gallery

Product Information

15274-1-AP targets SPARC in WB, IHC, IF, CoIP, ELISA applications and shows reactivity with human, mouse, rat, pig samples.

Tested Reactivity human, mouse, rat, pig
Cited Reactivityhuman, mouse, rat, deer, sika deer
Host / Isotype Rabbit / IgG
Class Polyclonal
Type Antibody
Immunogen SPARC fusion protein Ag7390
Full Name secreted protein, acidic, cysteine-rich (osteonectin)
Calculated molecular weight 35 kDa
Observed molecular weight 43 kDa
GenBank accession numberBC004974
Gene symbol SPARC
Gene ID (NCBI) 6678
Conjugate Unconjugated
Form Liquid
Purification Method Antigen affinity purification
Storage Buffer PBS with 0.02% sodium azide and 50% glycerol pH 7.3.
Storage ConditionsStore at -20°C. Stable for one year after shipment. Aliquoting is unnecessary for -20oC storage.

Background Information

Secreted Protein Acidic And Cysteine Rich (SPARC), also known as osteonectin or basement-membrane protein 40 (BM-40), is a secreted protein essential in the calcification of bone. 

What is the molecular weight of SPARC?

The calculated molecular mass of SPARC is 35 kDa. SPARC is a glycoprotein consisting of 303 amino acids in the cytoplasm and 286 amino acids after the signal sequence is cleaved in secretion. 

Where is SPARC expressed?

Osteoblasts secrete SPARC during bone formation, with high levels found in immature bone compared to mature bone that is in homeostasis (PMID: 2440898). SPARC is also secreted in adult mineralized tissues that have high turnover, such as osteoid and dentin, by cells other than osteoblasts. This includes bone marrow progenitor cells and hypertrophic chondrocytes but also endothelial cells and fibroblasts.

Though previously described as being exclusively expressed in mineralized tissue, it is now understood that SPARC is more widely expressed and is associated with high levels of collagen deposition, found in the extracellular matrix (ECM) of a number of tissues.

What is the function of SPARC?

SPARC contains both a collagen-binding domain and a hydroxyapatite (HA) binding region, so is thought to enhance mineralization by binding both collagen and HA crystals, causing the release of calcium ions (PMID: 26851678).

SPARC can bind to a number of different ECM proteins, particularly collagen, and may even influence the assembly of these proteins (PMID: 19798598). It is known to regulate interactions between cells and the ECM, meaning it plays a role in many important processes such as cell migration and proliferation.

What diseases are associated with SPARC?

Overexpression of SPARC has been identified in a number of different types of cancers (PMID: 18849185), although its role may vary. For example, in neuroblastomas SPARC acts as a suppressor but in gliomas, it causes greater invasion of the tumor. Mutations in SPARC can also lead to Osteogenesis Imperfecta, also known as brittle bone disease (PMID: 26027498).


Product Specific Protocols
WB protocol for SPARC antibody 15274-1-APDownload protocol
IHC protocol for SPARC antibody 15274-1-APDownload protocol
Standard Protocols
Click here to view our Standard Protocols



J Cell Physiol

Priming integrin α5 promotes human dental pulp stem cells odontogenic differentiation due to extracellular matrix deposition and amplified extracellular matrix-receptor activity.

Authors - He Wang

J Proteomics

Quantitative proteomic analysis of deer antler stem cells as a model of mammalian organ regeneration.

Authors - Zhen Dong

Invest Ophthalmol Vis Sci

Myosin-X Silencing in the Trabecular Meshwork Suggests a Role for Tunneling Nanotubes in Outflow Regulation.

Authors - Ying Ying Sun

J Biomed Mater Res A

Effects of hydrogen peroxide on biological characteristics and osteoinductivity of decellularized and demineralized bone matrices.

Authors - Quan Qing


SARS-CoV-2 desensitizes host cells to interferon through inhibition of the JAK-STAT pathway.

Authors - Da-Yuan Chen

Ann Coloproctol

Expression of Secreted Protein Acidic and Rich in Cysteine in the Stroma of a Colorectal Carcinoma is Associated With Patient Prognosis.

Authors - Kim Jeong Yeon JY