2.5.1.84 chloroplast - 9507 2.5.1.84 chloroplast plastidic isozyme OsSPS2 9507 2.5.1.84 microsome - - 2.5.1.84 mitochondrion mitchondrial isozyme OsSPS1 5739 2.5.1.84 plastid - 9536 2.5.1.84 plastid isoform SPS2 shows a putative transit peptide of 57 amino acids for plastidal localization at the N-terminus 9536