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J Neurosci Methods. 1999 Oct 15;92(1-2):137-44.

A polyclonal goat antiserum against the calcium-binding protein calretinin is a versatile tool for various immunochemical techniques.

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Institute of Histology and General Embryology, University of Fribourg, Pérolles, Switzerland.


Specific antibodies are useful tools to label particular neurons and at times to delineate neuronal circuits--a task not easily achieved by other techniques. Human recombinant calretinin, a protein belonging to the EF-hand family of Ca2+-binding proteins, was used to produce an antiserum in goat. The specificity of the antiserum to recognize calretinin was demonstrated in brain extracts from mouse, rat, and chick and in extracts from human tumor cell lines known to express this protein. Immunohistochemically, the antiserum-stained specific neurons in human, rhesus monkey, mouse, and rat brain. The goat anti-calretinin antiserum is an appropriate tool for double- or triple-immunolabeling studies along with previously-established rabbit and mouse antibodies. Thus, it allows for the concomitant staining with antibodies directed against other EF-hand calcium-binding proteins including calbindin-D28k and parvalbumin. The antiserum can further be used for the quantification of calretinin in different tissues or cell lines in a sandwich ELISA. Additionally, it is well suited for the detection of calretinin in certain cell lines or malignant pleural mesotheliomas. Immunostaining of these samples is comparable to that with the well-characterized calretinin-specific polyclonal rabbit antiserum 7696.

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