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Phenotypes Associated with This Genotype
Genotype
MGI:3850334
Allelic
Composition
Sox18Ra-Op/Sox18+
Genetic
Background
involves: C57BL/6J * DBA/2J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Sox18Ra-Op mutation (1 available); any Sox18 mutation (26 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• many mice are dead or dying shortly after birth (J:260)
• many mice are dead or dying at birth (J:279)
• fewer than expected mice are present at weaning (J:260)
• edematous mice die prior to weaning (J:279)

growth/size/body
• mice are smaller than normal from birth up to three months of age (J:260)
• at weaning mice are two-thirds the size of wild-type mice (J:260)
• mice that die prior to weaning exhibit swollen abdomens with perintoneal cavities filled with thin, white liquid unlike in wild-type mice

homeostasis/metabolism
• in some mice at birth
• at birth, some mice are edematous (J:260)
• mice that die around birth are edematous in the neck, shoulders, and abdominal and pleural cavities (J:260)
• mice that die around birth have edematous skin that is stretched, glossy, membranous in appearance, with red patches

integument
• mice that die around birth have edematous skin that is stretched, glossy, membranous in appearance, with red patches
• mice have some awl hairs unlike in wild-type mice
• asynchronous (J:260)
• asynchronous (J:279)
• at 3 days of age, mice are still pink due to sparse coat unlike wild-type mice that have developed a coat (J:260)
• initiation of each follicle type is delayed compared to in wild-type mice (J:279)
• some zigzag hairs are narrow, curled, lacked constrictions, and contain small medullar cells which lack pigment unlike in wild-type mice
• only a small patch on the shoulders (J:260)
• zigzag hairs are absent in the middle of the dorsum (J:279)
• mice lack follicles in the quiescent stage and are abnormal with bulbs that are twisted and curved unlike in wild-type mice
• at E17, mystacial vibrissa are incomplete and post-orbital vibrissa are absent or reduced in size compared to in wild-type mice
• mice lack inter-ramal and anterior supra-orbital vibrissa unlike wild-type mice
• postoral and posterior supra-orbital vibrassa are decreased in number compared to in wild-type mice
• anterior vibrissae and their follicles are absent unlike in wild-type mice
• at E17, post-orbital vibrissa are shorter than normal


Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB)), Gene Ontology (GO)
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last database update
01/20/2026
MGI 6.24
The Jackson Laboratory