Fig. 4
Tissue-specific expression patterns between system categories. a Distribution of the number of tissue-specific genes in all system categories. b Examples of TSG in the circulatory system (MYL3), the digestive system (LOC100847998) and the endocrine system (NNAT). The x-axis represents tissue labeled with the same colors as in Fig. 1 and the y-axis is the FPKM value. c Network topology analysis of 477 TSGs based on the String database. Each node represents a tissue-specific protein-coding gene. The size of the node indicates the level of expression of tissue-specific protein-coding genes. The node colors represent ten system categories, and the gray means that the gene comes from the STRING database. The edges represent the co-expression relationship between tissue-specific protein-coding genes. d Functional annotation and enrichment distribution of tissue-specific gene sets in the system. The x-axis represents -log10 (P value) and the y-axis represents GO term