BALB/c nude

Spontaneous Mutant

BALB/c nude Spontaneous Mutant Mouse Model
Live production of this model will cease by Dec 29, 2017. Please contact Taconic if you have future needs for this model.

BALB/c Background

  • Model #
  • Genotype
  • Nomenclature
    C.Cg/AnNTac-Foxn1nu NE9
    C.Cg/AnNTac-Foxn1nu NE9
    C.Cg/AnNTac-Foxn1nu NE9
    C.Cg/AnNTac-Foxn1nu NE9
  • Foxn1nu mutation backcrossed to the BALB/cAnNTac inbred strain for equivalent of nine generations
  • Taconic maintains this valuable model at two health designations, Defined Flora from gnotobiotic isolators and Restricted Flora™ from Isolated Barrier Units™
  • The deficiency in T cell function allows athymic mice to accept and grow xenografts as well as allografts of normal and malignant tissues. Tissues from the BALB/c Nude can be transplanted onto normal BALB/c mice.
  • The autosomal recessive nude gene in homozygous (sp/sp) mice causes the lack of fur and an abnormal thymus. The deficiency in T cell function allows athymic mice to accept and grow xenografts as well as allografts of normal and malignant tissues.
  • Heterozygous (sp/wt) mice carry only one copy of the nude mutation and have hair. Heterozygous nudes were originally thought to have normal immune systems, but in fact have immune alterations such as reduced bone marrow stem cells and lower thymus weights. Heterozygous nudes may thus not be appropriate for use as sentinels. They may be used in PK/dosing studies.

Genetic Background:

BALB/c Background


Taconic received the BALB/c Nude Spontaneous Mutant model from the NIH Animal Genetic Resource in 1980. The mice were backcrossed eighteen generations. The mice are maintained by incrossing non-brother x sister mice.


Live production in Denmark of this model ceased on November 20, 2015. This model continues to be available from live colonies in the US.


Refer to the BALB/c (background strain) for inbred genetic data.

Coat Color Loci:

Tyrc, Tyrp1b





Taconic cannot routinely accept orders by weight for this model due to colony size. Please inquire for options if weight is critical for your experiment.

n= 100 per sex at RF health standards from US colonies. Data collected 2013-15.
High and Low represent mean +/- 2 standard deviations.
Based on sample size the charts above represents ~95% of the population.
All growth curves represent animals housed in our barriers, at our standard density and fed NIH31-M diet. Variations at customer facilities will alter expected growth curves.
Growth charts are provided only as a guide, if a specific weight criteria is needed please order animals by weight.

Customize this chart by clicking the legend elements, then explore download options by hovering your cursor over the down arrow to the right of the chart title.
Average litter size: 7