Calcineurin (calcium- and calmodulin- stimulated phosphatase) α subunit purified from bovine brain was found to be composed of two polypeptides, 61 KDa (α1) and 59 KDa (α2). The two peptides were separated and extracted from polyacrylamide gel. The immuno-peptide mapping of the purified peptides by partial proteolysis showed that the 59-KDa polypeptide was not a degradative product of the 61-KDa polypeptide. The interaction of the enzyme with two monoclonal antibodies, Vj6 and Vd3, raised against bovine brain calcineurin revealed that the 61-KDa polypeptide was recognized by both Vj6 and Vd3, whereas the 59-KDa one was recognized only by Vj6. These results indicate that there are at least two isoforms of calcineurin a subunits in bovine brain.
|Number of pages||7|
|Publication status||Published - Nov 28 1991|
ASJC Scopus subject areas