A. Sakamoto et al., CDNA CLONING AND EXPRESSION OF THE PLASTIDIC COPPER ZINC-SUPEROXIDE DISMUTASE FROM SPINACH (SPINACIA-OLERACEA L) LEAVES, Plant and Cell Physiology, 34(6), 1993, pp. 965-968
A cDNA clone for copper/zinc-superoxide dismutase (Cu/Zn-SOD) was isol
ated from spinach (Spinacia oleracea L.) leaves. Its nucleotide sequen
ce showed that it codes for a precursor polypeptide of 222 amino acids
, including the NH2-terminal 68-residue extension which corresponds to
a plastidic transit peptide. Northern hybridization, using plastidic
and cytosolic Cu/Zn-SOD cDNAs as the probes, revealed that these two g
enes are differentially expressed in the roots and leaves of spinach.