There are 4 tubes, I am not sure which tube I need to fill for my test?

Our kits come with the following tubes

Two ACD (yellow top tubes) – Kindly fill both the tubes completely for any EliSpot or Spot testing you order.​

One Serum (tiger top tube) – Kindly fill the serum tube completely for any Serology/Antibody test you order (ELISA and Western Blot)​

One EDTA (purple top tube) – Kindly fill the EDTA tube completely when you order a CD57 NK cell Subset or T-cell subset testing.