Relating tissue specialization to the differentiation of expression of singleton and duplicate mouse proteins

Table 2 Tissue distribution of specifically expressed proteins (expressed in at most three tissue clusters)

Tissue	% Specifically expressed proteins (4573)^a	Specifically expressed singleton proteins (60)^b	Specifically expressed duplicate proteins (497)^b	Phyletic distribution of singleton proteins^c
				Pre-metazoan (25)	Metazoan- specific (32)
Antrum	0.021 (2958)	2 (0.001)	33 (0.011)	2	0
Appendix	0.007 (2168)	1 (0.000)	7 (0.003)	0	1
Bladder	0.035 (3236)	5 (0.002)	54 (0.017)	3	2
Brain	0.086 (3183)	11 (0.003)	147 (0.046)	4	7
Cecum	0.033 (3219)	7 (0.002)	52 (0.016)	5	2
Distal colon	0.004 (2271)	1 (0.000)	5 (0.002)	0	1
Proximal colon	0.007 (2382)	1 (0.000)	10 (0.004)	0	1
Duodenum	0.045 (3230)	6 (0.002)	83 (0.026)	2	3
Eye	0.066 (3390)	9 (0.003)	121 (0.036)	5	4
Gall bladder	0.040 (3338)	12 (0.004)	70 (0.021)	10	2
Heart	0.014 (2693)	1 (0.000)	23 (0.009)	0	1
Ileum	0.050 (3393)	11 (0.003)	82 (0.024)	6	5
Jejunum	0.043 (3230)	5 (0.002)	72 (0.022)	2	3
Kidney	0.029 (3144)	5 (0.002)	58 (0.018)	4	1
Liver	0.038 (2588)	7 (0.003)	66 (0.026)	5	2
Lung	0.039 (3166)	4 (0.001)	72 (0.023)	0	3
Muscle	0.013 (2241)	2 (0.001)	23 (0.010)	2	0
Spleen	0.065 (3271)	11 (0.003)	81 (0.025)	6	4
Testis	0.074 (3014)	21 (0.007)	90 (0.030)	6	13
Thymus	0.056 (3099)	18 (0.006)	58 (0.019)	10	8
Vas deferens	0.012 (2594)	1 (0.000)	16 (0.006)	0	1

^aNumbers in brackets: total number of expressed proteins. ^bNumbers in brackets: fraction out of the total number of proteins expressed in the tissue. ^cThree of the specifically expressed singleton proteins are not classified to any phyletic category (as described under Materials and methods).

ISSN: 1474-760X