Mouse Genome Informatics
ht1
    Rr28tm1Msb/Rr28+
involves: 129P2/OlaHsd * C57BL/6 * M. m. castaneus
Key:
phenotype observed in females
phenotype observed in males
N normal phenotype
cellular
N
• heterozygotes display normal imprinted expression of H19 and Igf2