Abstract: High octane C7 hydrocarbons, particularly 2,2,3-trimethylbutane (“triptane”) and 2,2,3-trimethyl-but-1-ene (“triptene”) (collectively “triptyls”) are produced by homologation of a feed comprising dimethyl ether and/or methanol and optionally including one or more aliphatic hydrocarbons in the presence of certain acidic zeolite catalysts. The process can be carried out at temperatures lower than those previously used for conversion of dimethyl ether and/or methanol to higher alkanes, including C7 alkanes, and results in selective production of triptane and/or triptene with relatively little isomerization to or production of other C7 alkanes.

Abstract: High octane C7 hydrocarbons, particularly 2,2,3-trimethylbutane (“triptane”) and 2,2,3-trimethyl-but-1-ene (“triptene”) (collectively “triptyls”) are produced by homologation of a feed comprising dimethyl ether and/or methanol and optionally including one or more aliphatic hydrocarbons in the presence of certain acidic zeolite catalysts. The process can be carried out at temperatures lower than those previously used for conversion of dimethyl ether and/or methanol to higher alkanes, including C7 alkanes, and results in selective production of triptane and/or triptene with relatively little isomerization to or production of other C7 alkanes.

Abstract: The present invention provides novel Pancreatic Polypeptide Family (“PPF”) polypeptides and methods for their use.

Abstract: The present invention relates to novel Pancreatic Polypeptide Family (“PPF”) polypeptides. The PPF polypeptides of the invention generally include at least two PPF motif, have at least 50% sequence identity to PYY (3-36) over its length and will generally retain, at least in part, a biological activity of a PP, PYY or NPY. Preferred PPF polypeptides of the invention are those having a potency in one of the assays described herein (preferably food intake, gastric emptying, pancreatic secretion, or weight reduction assays) which is greater than the potency of PP, NPY, PYY, or PYY(3-36) in that same assay. In one aspect, the PPF polypeptides of the invention include novel PYY analog polypeptides. In another aspect, the PPF polypeptides of the invention include PPF chimeric polypeptides including a fragment of a PP family polypeptide linked to a second PP family polypeptide, wherein each of the first and second fragments includes a PPF motif.