The present invention relates to novel purified and isolated nucleotide sequences encoding mammalian Ca2calmodulin stimulated phosphodiesterases and cyclic-GMP-stimulated phosphodiesterases. The first object may be embedded in a cell of a spreadsheet running on a spreadsheet application. The second end cap member includes an opening for allowing air to exit the housing member. The control circuit includes a first input coupled to the word-line; and a second input coupled to the column selection line. The vendor sends the receipt to the mobile terminal of the user, the mobile terminal storing the receipt for subsequent presentation at the point of delivery of the ordered goods or services.