changing the location of the genomic region can be done through several means.
direct coordinate entry
coordinates can be directly entered into the search box at the top of the genome browser page
The format of direct coordinate entry is very flexible. The order of asm:: chrom: start end is arbitrary. Chromosomes are recognized by either starting with chr or ending in a single : suffix. Genome name is recognized by a double :: suffix. The minimum requirement is that a chromosome name (eg chr3:) is specified. Any numbers in the query are assumed to be the start and end, order is not important. If only a single number is found then current genome length is preserved and it is centered on this chromosome positon.
Examples of valid direct chromosome locations
- chr21:34,949,407-34,965,611 [ UCSC genome browser style ]
- chr21:34949407..34965611 HG19::
- chr21 35965611 34949407 HG19::
- chr13 34231851 35327476
- chr13 3496500
- hg19:: chr13 35000000
- 3496500 chr12
searching for genomic annotation with keywords
The annotation tracks loaded into the current view can be searched for specific features via keyword searching. This can be searching for entrez genes, refseq, ensembl genes, mirBASE, gencode, mRNA or any other annotation track which has metadata. Entrez genes in the ZENBU system have been loaded with extensive metadata, so one can even search for terms like hemo, liver, amyloid, or even complex multiple keyword queries. Then simply click the feature you want to move the view to.
Big arrows move the view left or right retaining about 20% of the visible region. The small arrows move the view retaining about 80% of the visible region.
Plus zooms the view in. Minus zooms the view out.
The large 'recycle' button will reload the region querying data from the server. The small recycle button simply redraws the display using the data currently cached on the user's computer.
The user can also change the display width of the genome browser to better fit their larger desktop screen monitor or their smaller smartphone or tablet device.
In addition this section of the interface displays the current genomic location in black, and the current position of the tracking line in red.
zooming into selection within a track
For example from this zoomed out region the user has selected a region of several genes
and then after clicking the magnify button the view is now zoomed into what was previously the selection
focusing view by selecting an annotation feature
For example from this zoomed out view
the user could double click the gene named AP2A1 which would select that feature and then zoom into it.
re-centering the view
If a user double clicks in the background of any track, the view will be re-centered on that location, but retains the same zoom level.