Shemyakin Institute of Bioorganic Chemistry, USSR Academy of Sciences, Moscow.
The alpha-subunit primary structure of cyclic GMP phosphodiesterase has been determined by parallel analysis of the protein amino acid sequence and the corresponding cDNA nucleotide sequence. The enzyme alpha-subunit contains 858 amino acid residues, its N-terminal amino group being acetylated. The partial primary structure of the enzyme beta-subunit has also been elucidated. A significant homology has been found between the alpha- and beta-subunits of cGMP phosphodiesterase.