Abstract: In various aspects and embodiments, the invention provides a nucleic acid molecule comprising a nucleotide sequence encoding a 7?-hydroxysteroid dehydrogenase (7?-HSDH) mutant that catalyzes at least the stereospecific enzymatic reduction of a 7-ketosteroid to the corresponding 7-hydroxysteroid, wherein the mutant has, compared to the wildtype 7?-HSDH of SEQ ID NO:2, a decreased substrate inhibition and/or an altered cofactor usage, and the mutant has, in comparison with the wildtype 7?-HSDH of SEQ ID NO:2, 1 to 15 amino acid additions, substitutions, deletions and/or inversions in the sequence motif VMVGRRE corresponding to positions 36 to 42 of SEQ ID NO:2.

Abstract: A connector system with a connector and a complementary connector, wherein the connector includes a housing element with a locking device and an electrical contact element, wherein the electrical contact element is arranged in the area of a front end of the housing element, and includes a closing element arranged on the housing element, which closing element surrounds both at least the rear end of the housing element and an area of the electrical cable arranged outside the housing element, and is closely connected with the housing element and the electrical cable such that at the rear end, the interior of the housing element is sealed from the surrounding in a substantially fully moisture-tight manner. The closing element may, optionally, be applied in a substantially liquid form.

Abstract: A socket for a circuit board, comprising: a base having an opening area for introducing an electrical conductor of the circuit board, a contact element for electrically contacting a conductor of the circuit board, and an electrical output electrically connected to the contact element, wherein the contact element comprises a returning connecting contact spring disposed in an introduction area, wherein said spring can be actuated returnably by applying a force along a force direction, such that the electrical conductor can be disposed between a connecting contact area and the connecting contact spring, and wherein each contact element is configured such that the electrical conductor can be brought into contact with the contact element by any desired contact configurations or combinations of contact configurations.

Abstract: The invention relates to a connector system with a connector and a complementary connector, wherein the connector includes a housing element with a locking device and an electrical contact element, wherein the electrical contact element is arranged in the area of a front end of the housing element, and includes a closing element arranged on the housing element, which closing element surrounds both at least the rear end of the housing element and an area of the electrical cable arranged outside the housing element, and is closely connected with the housing element and the electrical cable such that at the rear end, the interior of the housing element is sealed from the surrounding in a substantially fully moisture-tight manner.

Abstract: A socket for a circuit board, comprising: a base having an opening area for introducing an electrical conductor of the circuit board, a contact element for electrically contacting a conductor of the circuit board, and an electrical output electrically connected to the contact element, wherein the contact element comprises a returning connecting contact spring disposed in an introduction area, wherein said spring can be actuated returnably by applying a force along a force direction, such that the electrical conductor can be disposed between a connecting contact area and the connecting contact spring, and wherein each contact element is configured such that the electrical conductor can be brought into contact with the contact element by any desired contact configurations or combinations of contact configurations.