DDBJ Amino Acid Sequence Database
                                     (DAD)

                                  Release 1.3
                                February 7, 1997

    This is a test release of DDBJ Amino Acid Sequence Database (DAD).  
This database was created by extracting all translated sequences from 
DDBJ entries.  The release 1.3 was made from DDBJ release 28 (Jan 1997).

1. Format of DAD Entries

    DAD is divided into 16 files according to the organisms from which 
amino acid sequences are derived.  The divisions are the same as those of 
DDBJ DNA Database.  Please refer to the release note of DDBJ (filename: 
ddbjrel.txt).
    All the amino acid sequences are stored in a fasta-like format (ODEN 
format).  The first line of an entry has a character '>' followed by an 
accession number of the entry, its PID (protein ID), and the product name 
if it is known.  Accession number of DAD is comprised of DDBJ accession 
number and a consecutive integer that begins from 1.  These two numbers 
are combined by a hyphen (-).  For example, amino acid sequences extracted 
from DDBJ entry D12345 have accession numbers D12345-1, D12345-2, etc.
    An amino acid sequence begins from the next line of accession number.  
Up to sixty amino acids are written on one line.  Following the amino acid 
sequence, there is a double slash (//), which means the end of the entry.  
Below is an example of DAD entry.


>X65727-1 PID:g825605 glutathione S-transferase
MAEKPKLHYSNTRGRMESIRWLLAAAGVEFEEKFIKSAEDLDKLRNDGYLMFQQVPMVEI
DGMKLVQTRAILNYIASKYNLYGKDIKEKALIDMYIEGIADLGEMILLLPFTQPEEQDAK
LALIQEKTKNRYFPAFEKVLKSHGQDYLVGNKLSRADIHLVELLYYVEELDSSLISSFPL
LKALKTRISNLPTVKKFLQPGSPRKPPMDEKSLEESRKIFRF
//


2. Statistics of DAD

    The following are statistics of this release of DAD.


total number of entries          214,066
total length of sequences     66,063,073 aa
average length                       308.6 aa
name of longest sequence      X90568-1 PID:g1212992
length of longest sequence        26,926 aa (X90568-1)

file         entries         peptides
-------------------------------------
ddbjbct        50384         14901442
ddbjest          946            85135
ddbjgss            1               53
ddbjhtg           39            15623
ddbjhum        21812          6639299
ddbjinv        24014          9206311
ddbjmam         6442          1790610
ddbjpat         1976           545619
ddbjphg         2560           487072
ddbjpln        33502         12930511
ddbjpri         1755           333164
ddbjrod        20895          6142851
ddbjsts           13             1283
ddbjsyn         1736           374837
ddbjuna          997           309199
ddbjvrl        38473          9956860
ddbjvrt         8521          2343204
-------------------------------------
total         214066         66063073