Table 1. MS identification of protein species induced by yca1 ablation.

Spot	Name	Score/peptides	Notes a
C1	PST2	72/2	Mitochondrial; Oxidative stress response protein induced by YAP1
C3	MRP8	52/2	Putative mitochondrial ribosomal protein
C4	PUP2	73/3	Alpha subunit of 20S proteasome
C5	LIA1	171/5	deoxyhypusine hydroxylase; Possible role in mitochondrial positioning
C6	SGT2	151/5	Similarity to human SGT which negatively regulates HSP70
C7	PEP4	155/4	Aspartate protease involved in metabolic degradation (pepsin like); important for protein turnover after oxidative damage
C8	TIF2	347/9	eIF4a homolog
C10	PYK1	90/5	Pyruvate kinase
C11	RAD23	181/4	Nucleotide excision repair; DNA damage checkpoint role normally degraded during G1/S transition
C12	PDI1	227/7	Protein disulfide isomerase involved in formation and management of scrambled protein disulfide bonds

^aNotes derived from ORF descriptions available at www.yeastgenome.org.