The present invention provides a method for coarse frequency synchronization in an OFDM receiver. The greening structure further comprises post-shaped members provided substantially consecutively from a portion where an external force loaded on the planting portion is directly received, to the bottom of the water-reserving portion or to the pavement, so that the external force loaded on the planting portion is received on the pavement through the post-shaped members. The domain derived from the first member of the specific binding pair can be directly fused to the phycobiliprotein or phycobiliprotein linker domain or be separated by a spacer that allows correct folding of both domains. The double-sided display panel may be used in a lid of a portable information terminal, such as a notebook PC, and a touch-panel function may be provided thereto.