zlacker

Organisms, yes. Individual genes within an organism may have no sequence identity to genes in other organisms (outside of what you would expect at random). See: https://en.wikipedia.org/wiki/Orphan_gene

>>biomcg+(OP)
Yes, that's what I thought. I worked with m. genitalium and we were always looking for proteins that had no homology or no existing structure (https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.20...)