>4r39_B mol:protein length:232 Blue-light-activated histidine kinase 2GEFKGLMGQSESPDRATELDRQLAEVQHRVKNHLAMIVSMIRIQSSQAGGVGSQFDSLSRRVEALQLLYQEMDIAGAAKATDKIIPLGAYLGRIASAINHIDGRGAIKVNVQADTVDVPVETAGRIGLLVSEVLTNALQHAFSDRASGVVQLRSSVMSGEQLRVTVEDDGRGIPEDCDWPNEGNLGSRIVRQLVQGLGAELNVTRGGTGTIVNIDIPLSQQKTLIADERTKD