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Genetic Labs

Houston, Texas

Genetic Laboratory
Medical Genetics Laboratories
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Medical Genetics Test Details

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Hereditary Hearing Loss and Deafness - GJB2 Related tests available.

GJB2-Related DFNB 1 Nonsyndromic Hearing Loss and Deafness | GJB2-Related DFNA 3 Nonsyndromic Hearing Loss and Deafness | Connexin 26 | Ichthyosis Hystrix-like with Deafness | Keratitis-Ichthyosis-Deafness Syndrome Autosomal Dominant | KID Syndrome Autosomal | Vohwinkel Syndrome | Deafness and Mutilating Keratoderma

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Diagnostic Testing Familial Mutation/Variant Analysis Mutation Testing General Population Prenatal Diagnosis Presymptomatic Testing
Deletion/Duplication Analysis GJB2 Deletion/Duplication Analysis
Test Code: 6271
GJB2 Deletion/Duplication Analysis
Test Code: 6271
GJB2 Deletion/Duplication Analysis
Test Code: 6272

We require that the referring center consult with our laboratory genetic counselors regarding prenatal cases prior to submitting any samples. Please call 1-800-411-4363.
Sequence Analysis GJB2 Sequence Analysis
Test Code: 6019
GJB2 Sequence Analysis
Test Code: 6078

This test can only be performed if there is a previously identified familial mutation.
GJB2 Sequence Analysis
Test Code: 6077

We require that the referring center consult with our laboratory genetic counselors regarding prenatal cases prior to submitting any samples. Please call 1-800-411-4363.


GJB2 Sequence Analysis
Test Information: Confirmation of Clinical Diagnosis - Known Familial Mutation(s), Confirmation of Clinical Diagnosis, Carrier Testing
Test Details
Test Code: 6019
Test Includes: Sequencing of the region(s) containing the familial alteration(s)

Special Notes: If the mutation to be tested in this individual is one previously identified in an affected family member, please order test (#6078). Please see detailed requirements under this test code.
Technical Information
Methodology: Sequence analysis is performed in both forward and reverse directions.
Gene Name: GJB2 (CX26, NSRD1)
Protein Name: Gap junction beta-2 protein (Connexin 26)
Test Type: Sequence Analysis
Sample & Shipping Information
Test Requisition: Molecular Diagnostics
Specimen Type: Blood
Requirements: Draw blood in an EDTA (purple-top) tube(s) and send 3-5 cc (Adults/Children) and 3 cc (Infant<2yrs).
Shipping Conditions: Ship at room temperature in an insulated container by overnight courier. Do not heat or freeze.



Turn Around Time: 21 days
Billing Information
List Price: *For Insurance or Institutional Prices, please call.
CPT Codes: 81252x1


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