The present invention relates to expression and assembly of foreign multimeric proteins\u2014e. The invention further relates to a handheld floor treatment device, comprising a floor part having a bow, which encompasses the floor part at least in some sections and which is connected to the floor part by means of a first joint that can be adjusted in the treatment direction, and further comprising a guide part attached to the bow, the guide part having a handle. The intermediate layer comprises at least one amorphous carbon layer having a Young’s modulus lower than 200 GPa and the tetrahedral carbon layer has a Young’s modulus higher than 200 GPa. A method in accordance with an embodiment of the invention allows use of motion compensated predictive coding to exploit temporal redundancy in the sequence while still allowing identical reconstruction of the frame using different reference frames.