Alpaca assembly and gene annotation


This is the first release of the low-coverage 2.51X assembly of the alpaca (Vicugna pacos). The genome sequencing is provided by the Human Genome Sequencing Center, Baylor College of Medicine and assembly is provided by the Broad Institute.

The N50 size is the length such that 50% of the assembled genome lies in blocks of the N50 size or longer. The N50 length for supercontigs is 178.39 kb and is 3.91 kb for contigs. The total number of bases in supercontigs is 2.93 Gb and in contigs is 1.92 Gb.

Gene annotation

Owing to the fragmentary nature of this preliminary assembly, it was necessary to arrange some scaffolds into "gene-scaffold" super-structures, in order to present complete genes. There are 3711 such gene-scaffolds, with identifiers of the form "GeneScaffold_1".

Mammalian Genome Project

Vicugna pacos is one of 24 mammals that will be sequenced as part of the Mammalian Genome Project, funded by the National Institutes of Health (NIH). A group of species were chosen to maximise the branch length of the evolutionary tree while representing the diversity of mammalian species. Low-coverage 2X assemblies will be produced for these mammals and used in alignments for cross-species comparison. The aim is to increase our understanding of functional elements, especially in the human genome.

More information

General information about this species can be found in Wikipedia.



AssemblyvicPac1, Jul 2008
Database version82.1
Base Pairs1,922,927,087
Golden Path Length2,967,746,133
Genebuild byEnsembl
Genebuild methodProjection build
Genebuild startedNov 2008
Genebuild releasedFeb 2009
Genebuild last updated/patchedApr 2013

Gene counts

Coding genes11,765
Non coding genes2,532
Small non coding genes2,366
Misc non coding genes166
Gene transcripts15,236


Genscan gene predictions93,309