hg19有哪些染色体？
chr1 chr2 chr3 chr4 chr5 chr6 chr7 chr8 chr9 chr10 chr11 chr12 chr13 chr14 chr15 chr16 chr17 chr18 chr19 chr20 chr21 chr22 chrX chrY chrM
其实还有其他“染色体”，只是我们的研究一般用不到，所以就没有合并进来。比如做同源分析，找变异什么的，还是要选好基因组。
gene_type有哪些？
cat gencode.v27.annotation.gtf | grep exon | cut -f6 -d" | grep -v "#" | sort | uniq > gene_type
3prime_overlapping_ncRNA IG_C_gene IG_C_pseudogene IG_D_gene IG_J_gene IG_J_pseudogene IG_V_gene IG_V_pseudogene IG_pseudogene MIAT_exon1 MIAT_exon5_1 MIAT_exon5_2 MIAT_exon5_3 Mt_rRNA Mt_tRNA SOX2OT_exon1 SOX2OT_exon3 SOX2OT_exon4 TEC TR_C_gene TR_D_gene TR_J_gene TR_J_pseudogene TR_V_gene TR_V_pseudogene Xist_exon1 Xist_exon4 antisense_RNA bidirectional_promoter_lncRNA lincRNA macro_lncRNA miRNA misc_RNA non_coding polymorphic_pseudogene processed_pseudogene processed_transcript protein_coding pseudogene rRNA ribozyme sRNA scRNA scaRNA sense_intronic sense_overlapping snRNA snoRNA transcribed_processed_pseudogene transcribed_unitary_pseudogene transcribed_unprocessed_pseudogene translated_processed_pseudogene unitary_pseudogene unprocessed_pseudogene vaultRNA
一共多少个基因？
cat gencode.v27.annotation.gtf | cut -f4 -d; | grep -v "#" | grep -v level | sort | uniq > gene
56609
一共多少个转录本？
cat gencode.v27.annotation.gtf | cut -f2 -d; | grep -v "#" | grep -v gene_type | sort | uniq > transcipt
200401
一共多少个外显子？
cat gencode.v27.annotation.gtf | grep -v "#" | grep exon | cut -f3-5 | sort | uniq > exon
1132357
有多少条lncRNA
cat gencode.v27.long_noncoding_RNAs.gtf | grep -v "#" | cut -f3 -d; | grep -v gene_type | sort | uniq > lincRNA
15754