Table 1.

Correlations of transcript and protein expression statistics of a common gene set

A	CH_P	EX_P	NZ_P	B	CH_T	EX_T	NZ_T	C	CH_P	EX_P	NZ_P
CH_T	0.52	0.43	0.30	CH_T	1.00	0.91	0.74	CH_P	1.00	0.75	0.59
EX_T	0.47	0.45	0.32	EX_T		1.00	0.83	EX_P		1.00	0.72
NZ_T	0.40	0.36	0.34	NZ_T			1.00	NZ_P			1.00

Pairwise Spearman rank correlation coefficients between A) protein (P) and transcript (T) expression statistics (log2 normalized spectral abundance factors vs log2 fluroescense intensities), B) transcript expression statistics and C) protein expression statistics for 1074 genes surveyed by both microarrays and shotgun proteomics of three Pachycladon species. Species abbreviations: CH: P. cheesemanii, EX: P. exile, NZ: P. novae-zelandiae. The highest correlation coefficients for each species are depicted in bold. Note that the proteome of each species correlates most strongly with its own transcriptome (A). Furthermore, transcriptomes and proteomes of CH correlate more strongly with those of EX than with those of NZ (B, C), reflecting the closer phylogenetic relationship between CH and EX as opposed to CH and NZ.