- Yu, D;
- Baird, MA;
- Allen, JR;
- Howe, ES;
- Klassen, MP;
- Reade, A;
- Makhijani, K;
- Song, Y;
- Liu, S;
- Murthy, Z;
- Zhang, SQ;
- Weiner, OD;
- Kornberg, TB;
- Jan, YN;
- Davidson, MW;
- Shu, X
Infrared fluorescent proteins (IFPs) provide an additional color to GFP and its homologs in protein labeling. Drawing on structural analysis of the dimer interface, we identified a bacteriophytochrome in the sequence database that is monomeric in truncated form and engineered it into a naturally monomeric IFP (mIFP). We demonstrate that mIFP correctly labels proteins in live cells, Drosophila and zebrafish. It should be useful in molecular, cell and developmental biology.