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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Phex+
wild type
MGI:2433798
Summary 10 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
ht1
Phexm1Jrt/Phex+ B6.129S1-PhexM1Jrt MGI:5492338
ht2
PhexHyp/Phex+ B6.Cg-PhexHyp/J MGI:3764685
ht3
PhexMhdabap024/Phex+ C3HeB/FeJ-PhexMhdabap024 MGI:6198726
ht4
PhexHyp-2J/Phex+ C57BL/6-PhexHyp-2J/J MGI:3037641
ht5
PhexSka1/Phex+ C57BL/6-PhexSka1 MGI:4450916
ht6
PhexHyp-Duk/Phex+ involves: BALB/cAnBomUrd MGI:3037643
ht7
PhexHpr/Phex+ involves: C3H/HeH * C57BL/6J MGI:5435551
ht8
PhexHyp/Phex+ involves: C57BL/6J MGI:5009025
ht9
PhexPug/Phex+ involves: C57BL/6J MGI:3806977
cx10
PhexHyp/Phex+
Tg(Bglap2-Phex)1Ldq/?
involves: C57BL/6J MGI:4431220


Genotype
MGI:5492338
ht1
Allelic
Composition
Phexm1Jrt/Phex+
Genetic
Background
B6.129S1-PhexM1Jrt
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Phexm1Jrt mutation (0 available); any Phex mutation (22 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
growth/size/body
• observed at 8 weeks of age

limbs/digits/tail
• abnormal curvature of the long bones

skeleton
• abnormal curvature of the long bones
• shorter bones throughout the skeleton, including tibiae and femurs
• abnormal curvature of the pelvic bones
• shorter, smaller vertebrae, in particular the tail vertebrae
• marked enlargement of all joints

homeostasis/metabolism

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
X-linked hypophosphatemic rickets DOID:0050445 OMIM:307800
J:196537




Genotype
MGI:3764685
ht2
Allelic
Composition
PhexHyp/Phex+
Genetic
Background
B6.Cg-PhexHyp/J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
PhexHyp mutation (2 available); any Phex mutation (22 available)
phenotype observed in females
phenotype observed in males
N normal phenotype

PhexHyp/Y male or PhexHyp/Phex+ female (front) with wild type mouse (rear)

cellular
N
• the gamete of origin, maternal or paternal, does not impact the serum phosphate levels

growth/size/body
• all females have a squared trunk

digestive/alimentary system
• age related malabsorption of phosphate such that at 4 weeks of age there is decreased phosphate absorption into isolated intestinal segments, particularly in the jejunum, in both hemizygous males and heterozygous females, but this malabsorption diminishes with age and approaches normal levels by 12 weeks of age

homeostasis/metabolism
• serum phosphate is significantly reduced relative to wild-type but similarity in serum phosphate levels between heterozygotes, homozygotes and hemizygotes indicates that there is not a gene dose effect

limbs/digits/tail
• shortened hind limbs are seen
• the overall length of the proximal caudal vertebrae is shorter, the growth plate is thicker than in wild-type controls, and there is accumulation of osteoid
• there is a gene dose effect such that the length of the proximal caudal vertebrae in heterozygotes is intermediate between that of wild-type and homozygous females, although similarly thickened growth plates are found in heterozygotes, homozygotes, and hemizygotes

skeleton
• the overall length of the proximal caudal vertebrae is shorter, the growth plate is thicker than in wild-type controls, and there is accumulation of osteoid
• there is a gene dose effect such that the length of the proximal caudal vertebrae in heterozygotes is intermediate between that of wild-type and homozygous females, although similarly thickened growth plates are found in heterozygotes, homozygotes, and hemizygotes
• there is a significant increase in cancellous osteoid volume per bone volume, and cancellous, endocortical, and periosteal osteoid thickness

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
X-linked hypophosphatemic rickets DOID:0050445 OMIM:307800
J:88352




Genotype
MGI:6198726
ht3
Allelic
Composition
PhexMhdabap024/Phex+
Genetic
Background
C3HeB/FeJ-PhexMhdabap024
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
PhexMhdabap024 mutation (1 available); any Phex mutation (22 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
homeostasis/metabolism
• high circuiting intact FGF23 levels at 12 and 27 weeks of age
• however, mice show normal levels of Vitamin D
• mice are hypophosphatemic
• however, mice are normocalcemic
• mice show a tendency to hypocalciuria

endocrine/exocrine glands
• mice exhibit hyperparathyroidism

renal/urinary system
N
• mice exhibit normal glomerular filtration rate, plasma urea and creatinine levels, and urea clearance, and no nephrocalcinosis, indicating normal kidney function
• mice show a tendency to hypocalciuria

cardiovascular system
N
• mice exhibit normal systolic blood pressure, normal cholesterol and high-density lipoprotein cholesterol levels in blood, no calcifications in the aorta, and no indication of left ventricular hypertrophy or cardiac fibrosis, indicating no cardiovascular disease

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
X-linked hypophosphatemic rickets DOID:0050445 OMIM:307800
J:264682




Genotype
MGI:3037641
ht4
Allelic
Composition
PhexHyp-2J/Phex+
Genetic
Background
C57BL/6-PhexHyp-2J/J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
PhexHyp-2J mutation (1 available); any Phex mutation (22 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
growth/size/body
• all females have a squared trunk

limbs/digits/tail
• shortened hind limbs are seen

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
X-linked hypophosphatemic rickets DOID:0050445 OMIM:307800
J:88352




Genotype
MGI:4450916
ht5
Allelic
Composition
PhexSka1/Phex+
Genetic
Background
C57BL/6-PhexSka1
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
PhexSka1 mutation (0 available); any Phex mutation (22 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
behavior/neurological
• affected females display an abnormal gait due to abnormal angulation of the hips and knees

limbs/digits/tail
• medial displacement of the acetabular cavity
• affected females have shortened hindlimbs
• affected females display shortening and bowing of the long bones in the hindlimbs
• all (71 of 71) heterozygous females display shortened femurs in the hindlimbs
• all (71 of 71) heterozygous females exhibit elliptical tail vertebrae

skeleton
• most bone measurements are significantly shorter than in wild-type controls; only the mandible length is not significantly shorter
• affected females display shortening and bowing of the long bones in the hindlimbs
• all (71 of 71) heterozygous females display shortened femurs in the hindlimbs
• all (71 of 71) heterozygous females exhibit elliptical tail vertebrae
• all (71 of 71) heterozygous females display a smaller pelvis with medial displacement of the acetabular cavity
• medial displacement of the acetabular cavity
• affected female heterozygotes have a shorter obturator foramen than wild-type controls
• 22 of 71 heterozygous females display rib exostoses at the costochondral junctions
• affected females show reduced bone density in the pelvic bones
• affected females show reduced bone density in shaft of the proximal femur
• affected females exhibit cortical thinning
• 22 of 71 heterozygous females display rib exostoses at the costochondral junctions

homeostasis/metabolism
• affected heterozygous females exhibit significantly lower serum phosphorus levels (1.15 +/- 0.22 mmol/L) than wild-type controls (2.47 +/- 0.05 mmol/L)
• affected heterozygous females exhibit significantly higher serum alkaline phosphatase levels (338 +/- 61 IU/l) than wild-type controls (192 +/- 15 IU/l)

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
X-linked hypophosphatemic rickets DOID:0050445 OMIM:307800
J:79953




Genotype
MGI:3037643
ht6
Allelic
Composition
PhexHyp-Duk/Phex+
Genetic
Background
involves: BALB/cAnBomUrd
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
PhexHyp-Duk mutation (3 available); any Phex mutation (22 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
behavior/neurological
• some but not all females showed circling behavior

growth/size/body
• some but not all females are mildly growth retarded in overall body size with a squared trunk
• unlike PhexHyp-2J it is not easy to distinguish between heterozygous females and wild-type females

limbs/digits/tail
• some but not all females have shortened hind limbs
• some but not all females have a shortened tail

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
X-linked hypophosphatemic rickets DOID:0050445 OMIM:307800
J:88352




Genotype
MGI:5435551
ht7
Allelic
Composition
PhexHpr/Phex+
Genetic
Background
involves: C3H/HeH * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
PhexHpr mutation (2 available); any Phex mutation (22 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
skeleton
• heterozygous female mice with bowed tibia
• increased mid femoral diaphysis diameter by 17%
• reduced more than 10%
• vertebral height reduced by 15%
• increased bone porosity at all ages
• at 20 weeks of age

homeostasis/metabolism

limbs/digits/tail
• reduced more than 10%
• increased mid femoral diaphysis diameter by 17%




Genotype
MGI:5009025
ht8
Allelic
Composition
PhexHyp/Phex+
Genetic
Background
involves: C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
PhexHyp mutation (2 available); any Phex mutation (22 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
digestive/alimentary system
• at 4 weeks, mice exhibit reduced calcium absorption in the duodenum compared with wild-type mice

growth/size/body

homeostasis/metabolism




Genotype
MGI:3806977
ht9
Allelic
Composition
PhexPug/Phex+
Genetic
Background
involves: C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
PhexPug mutation (0 available); any Phex mutation (22 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
growth/size/body
• small body size

limbs/digits/tail
• shortened hind limbs
• shortened tail




Genotype
MGI:4431220
cx10
Allelic
Composition
PhexHyp/Phex+
Tg(Bglap2-Phex)1Ldq/?
Genetic
Background
involves: C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
PhexHyp mutation (2 available); any Phex mutation (22 available)
Tg(Bglap2-Phex)1Ldq mutation (0 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
homeostasis/metabolism
• despite increased Phex expression in osteoblasts these mice still have the diminished serum phosphate of hypophosphatemia mutants

skeleton
• despite increased Phex expression in osteoblasts these mice have the same skeletal defects of hypophosphatemia mice including reduced bone mineral density, smaller than normal caudal vertebrae, increased widening and irregularity of growth plates, rickets and osteomalacia





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last database update
12/30/2025
MGI 6.24
The Jackson Laboratory