What is the nature of the UMIs incoporated into the SMARTer® Human BCR IgG IgM H/K/L library?

What is the nature of the UMIs incoporated into the SMARTer® Human BCR IgG IgM H/K/L library?

UMIs incoporated into the SMARTer® Human BCR IgG IgM H/K/L library represent a random 12 nt sequence: NNN,NNN,NNN,NNN, (N=G,T,A,C)

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