What is the number of long non coding RNAs in the human genome
['The recent ENCODE (Encyclopedia of DNA Elements) study reported 9,640 lncRNA loci in the human genome, which corresponds to around half the number of protein-coding genes. ', 'Over 18,000 transcripts are presently annotated as lncRNA, and encompass previously annotated classes of noncoding transcripts including large intergenic noncoding RNA, antisense RNA and processed pseudogenes', 'BACKGROUND: Over 10,000 long intergenic non-coding RNAs (lincRNAs) have been identified in the human genome.']
['Different estimates put currently the number of human long non coding RNAs between 10,000 and 20,000']
['between 10,000 and 20,000']