Abstract: The invention provides a compound of the formula (I): wherein E is O, S, or NH; G is selected from hydrogen; carbocyclic and heterocyclic groups having from 3 to 12 ring members; and acyclic C1-8 hydrocarbyl groups optionally substituted; provided that E—G is not OH or SH and further provided that E—G does not contain the group O—O; two adjacent moieties selected from R3, R4, R5 and R6, together with the carbon atoms to which they are attached, form a fused heterocyclic group having from 5 to 7 ring members and 1, 2 or 3 ring heteroatoms selected from N, O and S; and the other two moieties selected from R3, R4, R5 and R6 are the same or different and are each as defined in the description. The Invention also provides compounds of the formula (I) for use as inhibitors of cyclin dependent kinases and for use in the treatment of disease states and conditions mediated by cyclin dependent kinases.

Abstract: The invention provides the crystal structure of the cytochrome P450 3A4 protein molecule. The structure is set out in Tables 1-4. The structure may be used in to model the interaction of compounds such as pharmaceuticals with this protein, and to determine the structure of related cytochrome P450 molecules.

Abstract: The invention provides the crystal structure of the cytochrome P450 3A4 protein molecule. The structure is set out in Table 5. The structure may be used in to model the interaction of compounds such as pharmaceuticals with this protein, and to determine the structure of related cytochrome P450 molecules.

Abstract: The present invention provides cytochrome 2C9 proteins which have been modified to introduce a proline residue at positions 220 or 222 of the wild type sequence which can be crystallised to provide high resolution structures. The structures may be used for homology modelling of other cytochrome P450 structures such as 2C8, 2C18 and 2C19, and for analysis of the interaction of ligands with P450.