SchemaSpy - Table pub.mgd.prb

Defines a relationship between a Marker and an Endonuclease for a specific Probe Reference. Variations exist between individuals in DNA fragment sizes cut by specific restriction enzymes; polymorphic sequences that result in RFLPs are used as markers on both physical maps and genetic linkage maps. RFLPs are usually caused by mutation at a cutting site.

Detail of PRB_Reference.

Generated by
SchemaSpy

Legend:

Primary key columns

Columns with indexes

Implied relationships

Excluded column relationships

< n > number of related tables

Column

Type

Size

Nulls

Auto

Default

Children

Parents

Comments

_rflv_key

serial

√

nextval('prb_rflv_seq'::regclass)

prb_allele._rflv_key

prb_allele__rflv_key_fkey C

primary key

_reference_key

int4

prb_reference._reference_key

prb_rflv__reference_key_fkey C

foreign key to PRB_Reference

_marker_key

int4

mrk_marker._marker_key

prb_rflv__marker_key_fkey R

foreign key to MRK_Marker

endonuclease

text

2147483647

√

null

endonuclease (An enzyme that cleaves its nucleic acid substrate at internal sites in the nucleotide sequence)

_createdby_key

int4

1001

mgi_user._user_key

prb_rflv__createdby_key_fkey R

user who created the record

_modifiedby_key

int4

1001

mgi_user._user_key

prb_rflv__modifiedby_key_fkey R

user who last modified the record

creation_date

timestamp

29,6

now()

date record was created

modification_date

timestamp

29,6

now()

date record was last modified

Table contained 22,683 rows at Mon Sep 11 06:12 EDT 2023

Indexes:

Column(s)	Type	Sort	Constraint Name
_rflv_key	Primary key, Used to cluster data	Asc	prb_rflv_pkey
_reference_key	Performance	Asc	prb_rflv_idx_clustered
_createdby_key	Performance	Asc	prb_rflv_idx_createdby_key
_marker_key	Performance	Asc	prb_rflv_idx_marker_key
_modifiedby_key	Performance	Asc	prb_rflv_idx_modifiedby_key