PMID: 2497732Apr 1, 1989Paper

Tissue and species distribution of the secreted carbonic anhydrase isoenzyme

The Biochemical Journal
R T FernleyJ P Coghlan

Abstract

The secreted carbonic anhydrases, CA VI, are high molecular mass, oligomeric enzymes originally found in the sheep parotid gland and saliva. The enzymes have been purified from the saliva or parotid glands of several different species. All the CA VI enzymes studied have an apparent subunit Mr of about 45,000 as previously reported for the sheep enzyme. By Western analysis, CA VI from human, cow and dog cross-reacted with antibody raised against the purified sheep enzyme whereas that of the mouse did not. The N-terminal sequences of the sheep, human, cow and mouse enzymes are reported. The sheep, cow and human N-terminal sequences are similar to one another while the mouse sequence is substantially different. Nevertheless, the amino acids in the aromatic cluster I (Trp-5, Tyr-7, Trp-16 and Tyr/Phe-20) have all been conserved, as is the case with the cytoplasmic carbonic anhydrases. Eighteen tissues from the sheep have been examined for the presence of CA VI by Western analysis but it has been found only in the salivary glands. Northern analysis and hybridization histochemistry show that the mRNA for CA VI in sheep is expressed specifically in the acinar cells of the parotid and submandibular glands.

Citations

Sep 27, 2003·DNA Sequence : the Journal of DNA Sequencing and Mapping·Masaru MurakamiMasao Asari
Nov 21, 2001·The Journal of Veterinary Medical Science·T NishitaM Shino
Feb 1, 1997·Archives of Oral Biology·K R EtzelR R Koepsel
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