Table 1.

Classification of Loci

Type	Class	Description	No.	Symbol
1	G	Gene: Transcribed region of the genome	252	Hugo > UniGene > GDB
	g	Predicted gene based on UniGene clusters (n = 229) or sequence analysis (n = 35)	264	GenBank accession no.
2	P	Polymorphic: Multiple polymorphisms	15	D-number
	V	Variable Number of Tandem Repeats (VNTR)	2
	Q	Tetra-nucleotide repeat	20
	T	Tri-nucleotide repeat	7
	D	Di-nucleotide repeat	83
	R	Restriction Fragment Length Polymorphism (RFLP)	1
	U	Unknown polymorphism	7
3	N	Nucleic acid	317	GenBank accession no.
Total			968

1, Genes; 2, polymorphisms; 3, DNA sequence.
↵Multiple polymorphisms with the same D-number.
↵Nucleic acid sequences that may include ESTs not yet associated with predicted genes and sequence-tagged sites.

A Sequence-Based Integrated Map of Chromosome 22