... and do not mix components from different lots.4. If the dry bag is red, don ’ t use. ... wells ’ average OD630 value is less than 0.2.If the sample ’ s OD630 value is greater than ... is judged to be positive; from 0.2 to 0.4, doubtful; and if less than 0.2, negative .We are Shenzhen ... PRRS,PRV ELISA kit, NDV,IB,IBD ELISA kit),small molecule antigen and antibodies, gene recombination antigen and antibodies, ...