How many libraries do I need to prepare from a single sample? Can I obtain both TCR and BCR from the same sample?Home FAQ Single Cell Kits sCircle Single Cell Full-Length TCR/BCR sequencing How many libraries do I need to prepare from a single sample? Can I obtain both TCR and BCR from the same sample?sCircle Single Cell Full-Length TCR/BCR Kit is available for TCR or BCR library preparation. Therefore, you will need to prepare two libraries: one for the transcriptome and one for the receptor (TCR or BCR).