Take the 2-minute tour ×
Biology Stack Exchange is a question and answer site for biology researchers, academics, and students. It's 100% free, no registration required.

Your lab works on an organism isolated from radioactive waste. However, you show that 3 very similar, but not quite identical, ssu-rRNA sequences can be amplified from the culture even though it is supposed to be pure. how could a pure culture be represented by more than one ssu rRNA sequence?

share|improve this question
Is this a homework question? –  leonardo Nov 8 '12 at 3:28
We'll need some more information. The easiest answer is that the culture is not pure. Are you comparing the entire rRNA sequence? How are you sequencing? Can we see some alignments? –  terdon Nov 8 '12 at 15:07

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.