The data files ("UCSC Chain Files") in this directory are property of The
Regents of the University of California, and made available free for
non-commercial use by Independent Researchers and Nonprofit Organizations. Any
other use of UCSC Chain Files requires a commercial license, for which users
should contact As used herein, "Independent
Researcher" means an individual who is autonomous with respect to the
research activities for which he or she uses the UCSC Chain Files (note: such
use does not extend to any use of the UCSC Chain Files at the direction and/or
for the benefit of a for-profit organization); and "Nonprofit
Organization" means a university or other institution of higher education,
or a not-for-profit organization officially recognized or qualified under the
laws of the country in which it is organized or located, or any nonprofit
scientific or educational organization qualified under a federal, state or local
jurisdiction's nonprofit organization statute. Downloading or using UCSC Chain
Files indicates your acceptance of the End User License Agreement (EULA) posted
at ""; redistribution of UCSC Chain
Files by you must include this README file with these license restrictions, in
the same archive or directory with the chain files.

This directory contains the data files required as input to 
the liftOver utility. This tool -- which requires a Linux 
platform -- allows the mass conversion of coordinates from 
one assembly to another. The executable file for the utility can 
be downloaded from

The file names reflect the assembly conversion data contained within
in the format <db1>To<db2>.over.chain.gz. For example, a file named file contains the liftOver data needed to convert hg18 
(Human Build 36) coordinates to hg19 (Human Build GRCh37). If no file is 
available for the assembly in which you're interested, please send a 
request to the genome mailing list ( and we will 
attempt to provide you with one.

To download a large file or multiple files from this directory, we recommend 
that you use ftp rather than downloading the files via our website. To do so: 
    user name: anonymous
    password: <your email address>
    go to the directory goldenPath/hg18/liftOver

To download multiple files from the UNIX command line, use the "mget" command. 
    mget <filename1> <filename2> ...
    - or -
    mget -a (to download all the files in the directory) 
Use the "prompt" command to toggle the interactive mode if you do not want 
to be prompted for each file that you download.

Please refer to the credits page 
( for guidelines and
restrictions regarding data use for these assemblies. 

      Name                        Last modified      Size  Description
Parent Directory - hg18ToAnoCar1.over.chain.gz 2007-02-18 11:18 12M hg18ToBosTau2.over.chain.gz 2006-01-07 21:53 83M hg18ToBosTau3.over.chain.gz 2007-02-24 10:15 81M hg18ToBosTau4.over.chain.gz 2008-03-11 20:07 81M hg18ToBraFlo1.over.chain.gz 2007-03-26 17:57 2.4M hg18ToCalJac1.over.chain.gz 2007-10-08 15:06 64M hg18ToCalJac3.over.chain.gz 2011-01-10 15:50 50M hg18ToCanFam2.over.chain.gz 2005-12-29 07:07 89M hg18ToCavPor3.over.chain.gz 2008-04-11 17:01 83M hg18ToDanRer3.over.chain.gz 2005-12-23 11:37 5.9M hg18ToDanRer4.over.chain.gz 2006-04-25 14:33 5.2M hg18ToDanRer5.over.chain.gz 2007-10-17 16:13 6.4M hg18ToDasNov1.over.chain.gz 2006-01-07 14:41 66M hg18ToEchTel1.over.chain.gz 2006-01-10 11:50 55M hg18ToEquCab1.over.chain.gz 2007-02-16 11:33 82M hg18ToFr1.over.chain.gz 2005-12-21 07:36 4.5M hg18ToFr2.over.chain.gz 2007-01-24 20:50 4.2M hg18ToGalGal2.over.chain.gz 2005-12-28 15:18 7.5M hg18ToGalGal3.over.chain.gz 2006-05-23 10:29 7.5M hg18ToGasAcu1.over.chain.gz 2006-10-17 16:04 4.7M hg18ToGorGor4.over.chain.gz 2016-06-23 16:06 15M hg18ToHg17.over.chain.gz 2006-04-03 10:17 231K hg18ToHg19.over.chain.gz 2010-07-26 11:25 137K hg18ToHg38.over.chain.gz 2014-02-19 16:21 336K hg18ToLoxAfr1.over.chain.gz 2006-01-12 06:56 69M hg18ToMm7.over.chain.gz 2005-12-24 12:33 73M hg18ToMm8.over.chain.gz 2006-02-17 15:44 73M hg18ToMm9.over.chain.gz 2007-08-14 16:49 74M hg18ToMonDom4.over.chain.gz 2006-02-16 17:25 26M hg18ToOrnAna1.over.chain.gz 2007-04-04 19:19 19M hg18ToOryCun1.over.chain.gz 2006-01-11 10:06 68M hg18ToOryLat2.over.chain.gz 2008-08-19 19:56 4.3M hg18ToPanPan1.over.chain.gz 2016-07-29 10:19 14M hg18ToPanTro1.over.chain.gz 2006-01-10 12:36 19M hg18ToPanTro2.over.chain.gz 2006-07-15 15:16 13M hg18ToPanTro4.over.chain.gz 2013-06-04 12:57 13M hg18ToPetMar1.over.chain.gz 2008-01-29 16:57 3.6M hg18ToPonAbe2.over.chain.gz 2007-10-03 15:11 28M hg18ToRheMac2.over.chain.gz 2006-04-14 09:45 39M hg18ToRn3.over.chain.gz 2005-12-26 06:09 71M hg18ToRn4.over.chain.gz 2006-02-17 21:27 70M hg18ToStrPur2.over.chain.gz 2007-08-15 16:20 14M hg18ToTetNig1.over.chain.gz 2006-01-07 07:19 5.2M hg18ToXenTro1.over.chain.gz 2006-01-07 01:37 5.4M hg18ToXenTro2.over.chain.gz 2006-04-20 16:06 6.2M md5sum.txt 2016-07-29 11:20 4.3K