What does StemExpress do?
  • Procures healthy and diseased human tissue and blood
  • Isolates cells
  • Processes whole blood (umbilical cord, adult peripheral, and maternal)
  • Cultures selected cell types
  • Isolates DNA and RNA
  • Conducts immunophenotyping using flow cytometry
How to thaw StemExpress primary cells for optimal viability?

Primary cells are very sensitive to many aspects of the thawing procedure, such as heat, DMSO, agitation, and high centripetal forces. Obtaining high viability after thawing human primary cells can be difficult if not performed quickly and with good laboratory techniques. At StemExpress, our laboratory technicians have years of experience handling and thawing frozen human primary cells and have designed a procedure that will help you obtain the highest viability of your cells. Click Thawing Protocol to access the protocol.

How does StemExpress process samples?

Under aseptic conditions in Class II, laminar-flow hoods.

Does StemExpress offer custom or specialty services?

Yes. StemExpress is happy to work with researchers to meet the specific needs of their work.

Where can StemExpress ship products?

All over the world. We have a variety of shipping methods to meet your needs. Please inquire for more information.

What kind of demographic information is attached to specimens?

StemExpress is serious about donor confidentiality, and we strictly observe HIPAA regulations. Personal identifying information is removed from all samples and replaced with a nonspecific numeric identifier.

If a study requires demographic information, we can provide researchers general identifiers like age, gender and a minimal health history.


Can a prior bone marrow donor be recalled for my experiments?

Yes, a donor is eligible to donate bone marrow every 16 weeks and other blood products after 4 weeks.

Can I get the CD34+ analysis and flow data from a bone marrow collection?

Yes, this data is available upon request.

What is the average lead time for bone marrow samples?

It takes 2 weeks on average. Schedule your delivery today to ensure the quickest turn around time.

Can bone marrow be collected in bags?

Yes, we can customize the collection based on specific requests.


Do you provide diseased blood?

Yes, we can source diseased blood upon specific request.

Can an apheresis donor be recalled for my experiments?

Yes, a donor is eligible to donate white blood cells every 4 weeks.

How many cells (PBMCs) can I isolate from 1 Leukopak®?

Usually around 8x10e9 PBMCs.

Is same day delivery available?

Yes, certain locations can receive same day courier delivery. We can also provide same day air shipments.

What is the maximum volume that can be collected into Vacutainer® tubes?

We can collect up to 250 ml into tubes.


Can we request maternal blood from a specific gestational age?

Yes. We can collect customized requests to meet your study specifications.

If I want Maternal blood from an aneuploidy, what type of test confirmations are offered?

Ultrasound confirmation, NIPT, Serum Protein Biomarkers, and CVS or Amniocentesis.

What is the maximum volume that can be collected from a maternal blood donor?

We can collect 60 ml every 8 weeks.

Can maternal blood be collected in Streck® tubes?

Yes, we provide this as an option.


How many CD34+ cells can I get from a cord?

Each cord is different and the number of CD 34+ cells varies greatly among the individual donors. Typically, 1-4 million CD 34+ cells per cord can be collected. We can provide larger lots upon request.

Can the cord blood be HLA typed?

Yes, upon request.

Have people used cord blood CD34+ cells to humanize mice?

Yes, we have many researchers that use our CD34+ cells to humanize mice.

Hi, have questions?

A StemExpress Expert is happy to help!

Call 530.303.3828 or Contact Us