CELL
Contents

This table gives a short explanation of the cellular sources of proteins that interact with the sites listed in the SITE table. Among them may be defined cell lines, tissues / organs, even whole organisms, or recombinant expression systems.
Fields

It should be noted that in individual entries some fields may be empty. In this case, these fields are not displayed.
AC Accession number   4-digit number
AS Accession numbers, secondary   when two or more entries are merged, the additional accession numbers, separated by commas, are stored in this field
DT Created
Updated		   date of entry creation; entry author
date of last entry updating; updater
SO Cellular factor source   cell, cell line, organ or recombinant expression system used as source for the identification of a certain site; the syntax for recombinant factors is:
rec({donor organism} – {acceptor organism}), e. g. rec(human-E.coli);
when appropriate, an intermediate organism serving as vehicle is given as well,
e. g. rec(rat-vaccina virus-HeLa)
OS Species   biological species
CD Cell description   description of the cellular factor source
BS Binding site   sites bound by a factor derived from this factor source (linked accession number; identifier.)
BR Binding region (ChIP-chip)   DNA fragments shown to be bound by a given factor in vivo (ChIP-on-chip experiment) in this cell line.(linked accession number.)
DR External database links   CLDB: accession number.
TRANSCompel: accession number.

The terminology of the factor sources ("Cellular factor source") corresponds to that used in the SITE table. Cell lines are given with their most common name (e.g., HeLa, 3T3), the most frequently used tissues may be abbreviated (e.g., rl for rat liver), others are explicitly mentioned. Recombinant materials are explained by the denotation rec({source organism} - {expressing cell}). Occasionally, a viral expression system is also indicated: rec(chick-baculovirus-Sf9).

In this table, no taxonomic classification is given since this kind of information is obscure in too many cases.

Where appropriate, links are given to the CLDB (http://www.biotech.ist.unige.it/cldb/indexes.html).