Human Ghrelin (TOTAL) RIA

FUNCTION: SwissProt: Q9UBU3 # Obestatin may be the ligand for GPR39. May have an appetite-reducing effect resulting in decreased food intake. May reduce gastric emptying activity and jejunal motility (By similarity).
SIZE: 117 amino acids; 12911 Da
SUBCELLULAR LOCATION: Secreted.
TISSUE SPECIFICITY: Highest level in stomach. All forms are found in serum as well. Other tissues compensate for the loss of ghrelin synthesis in the stomach following gastrectomy.
PTM: O-octanoylation or O-decanoylation is essential for ghrelin activity. The O-decanoylated forms Ghrelin-27-C10 and Ghrelin-28- C10 differ in the length of the carbon backbone of the carboxylic acid bound to Ser-26. A small fraction of ghrelin, ghrelin-28- C10:1, may be modified with a singly unsaturated carboxylic acid. & Amidation of Leu-98 is essential for obestatin activity (By similarity).
SIMILARITY: SwissProt: Q9UBU3 ## Belongs to the motilin family.

Two-day disequilibrium assay at 4°C. Sample volume: ≤ 100 μL Plasma (collected on ice) recommended

Linearity 99–146%

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