BIOCHIMIE, 1975, 57, 545-550.
Structure quaternaire de la polynucldotide phosphorylase d ' E s c h e r i c h i a caractdrisation chimique de la forme A.
coli
•
C. PORTIER.
I n s t i t u t de Biologie P h y s i c o - c h i m i q u e , rue P. et M. Curie, 75005 Paris. (18-12-1974). Summary - - We had previously shown the existence of two classes of polynucleotide phosphorylases : Form A 'which is made of ct chains and carries the catalytic sites ; and form B which is constituted of u chains and of 6 chains. We performed some chemical analyses of form A (N-terminal sequence, amino acid composition, peptide mapping) which suggest that the c¢ chains are all identical and moreover that they have no relalionship with the ~ chains. The latter do not therefore derive from a partial proteolytic degradation of the
Structure quaternaire de la polynucldotide phosphorylase d ' E s c h e r i c h i a caractdrisation chimique de la forme A.
coli
•
C. PORTIER.
I n s t i t u t de Biologie P h y s i c o - c h i m i q u e , rue P. et M. Curie, 75005 Paris. (18-12-1974). Summary - - We had previously shown the existence of two classes of polynucleotide phosphorylases : Form A 'which is made of ct chains and carries the catalytic sites ; and form B which is constituted of u chains and of 6 chains. We performed some chemical analyses of form A (N-terminal sequence, amino acid composition, peptide mapping) which suggest that the c¢ chains are all identical and moreover that they have no relalionship with the ~ chains. The latter do not therefore derive from a partial proteolytic degradation of the
