TABLE 1.

LTQ-MALDI peptide mass fingerprinting of proteins differentially expressed in transgenic Arabidopsis expressing pBA002-AtPARK13 compared with plants expressing pBA002 alone with and without 37 °C heat treatment

Spot no.	Protein	Swiss-Prot Accession no.	Mr	pI	Average -fold change		Function
					21 °C	37 °C
			Da		-fold
Down-regulated proteins in pBA002-AtPARK13
1	Photosystem II subunit P-1	Q42029	28,249	6.90	1.19 ± 0.08a	0.94 ± 0.21	Calcium ion binding, poly(U) RNA binding
2	Peptidyl-prolyl cis-transp isomerase CYP20–3	P34791	28,532	8.83	1.08 ± 0.18	1.23 ± 0.09a	Peptide binding, peptide-prolyl cis-trans isomerase activity
3	Germin-like protein	P92998	23,195	6.81	2.06 ± 0.84	1.824 ± 0.14a	Manganese ion binding, Nutrient reservoir activity
Up-regulated protein in pBA002-AtPARK13
4	Glutathione transferase	O80852	24,148	7.03	1.35 ± 0.42	1.42 ± 0.01a	Copper ion binding, glutathione binding, glutathione transferase activity, peroxidase activity

^a Significantly (p < 0.05) different proteins at 21 and 37 °C as compared with transgenic plants harboring the empty vector controls.