Test Catalog

Test ID: BTKFP    
Bruton Tyrosine Kinase (BTK) Genotype and Protein Analysis, Full Gene Sequence and Flow Cytometry, Blood

Specimen Type Describes the specimen type validated for testing

Whole Blood EDTA

Advisory Information

New York Clients: The BTK / Btk Protein Flow portion of this test is not New York State approved. Order BTKS / Bruton Tyrosine Kinase (BTK) Genotype, Full Gene Sequence.

Shipping Instructions

Specimens are required to be received in the laboratory weekdays and by 4 p.m. on Friday. Draw and package specimen as close to shipping time as possible.


It is recommended that specimens arrive within 24 hours of draw.


Samples arriving on the weekend and observed holidays may be canceled.

Necessary Information

Ordering physician's name, phone number, and patient information are required.

Specimen Required Defines the optimal specimen required to perform the test and the preferred volume to complete testing

Two separate EDTA specimens and the patient information sheet are required.


Specimen Type: Blood for BTKSP / Bruton Tyrosine Kinase (BTK) Genotype, Full Gene Sequence

Container/Tube: Lavender top (EDTA)

Specimen Volume: 3 mL

Collection Instructions:

1. Send specimen in original tube.

2. Label as BTKSP.

Specimen Stability Information: Refrigerated (preferred)/Ambient


Specimen Type: Blood for BTK / Bruton Tyrosine Kinase (Btk), Protein Expression, Flow Cytometry, Blood

Container/Tube: Lavender top (EDTA)

Specimen Volume: 4 mL

Collection Instructions:

1. Send specimen in original tube. Do not aliquot.

2. Ship at ambient temperature only.

3. Label as BTK.

Specimen Stability Information: Ambient 72 hours

Additional Information: For flow cytometry serial monitoring, we recommend that specimen draws be performed at the same time of day.

Special Instructions Library of PDFs including pertinent information and forms related to the test


Bruton Tyrosine Kinase (BTK) Genotype Patient Information (T620) is required. see Special Instructions

Specimen Minimum Volume Defines the amount of sample necessary to provide a clinically relevant result as determined by the Testing Laboratory

BTKSP: 0.35 mL
BTK: 2 mL

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected

No specimen should be rejected.

Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the performing laboratory, alternate acceptable temperatures are also included

Specimen TypeTemperatureTimeSpecial Container
Whole Blood EDTAVaries72 hours