Horizontal gene transfer contributed to the evolution of extracellular surface structures: the freshwater polyp Hydra is covered by a complex fibrous cuticle containing glycosaminoglycans and proteins of the PPOD and SWT (sweet tooth) families.

PLoS One · 2012 · PMC3531485 · PMID 23300632

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highly significantno p-value reported

Mass spectrometry of the proteins in bands 1–4 revealed multiple peptides with highly significant MS/MS scores.

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