Three positions with ambiguity codes

Three positions on chromosome 3 are masked with 'N' in the UCSC version of the hg19/GRCh37 reference genome. These positions have IUPAC ambiguity codes in our hg19 version:

  • M—IUPAC code for A or C nucleotides

  • P—IUPAC code for A or G nucleotides

Position

IUPAC ambiguity code in hg19 reference

Hard masked character in UCSC hg19

60830534

M

N

60830763

R

N

60830764

R

N

Related Topics
Parent topic: hg19 reference