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Official Full Name: small proline rich protein 1B<br />Also known as: SPRR1; GADD33; SPR-IB; CORNIFIN<br />The protein encoded by this gene is an envelope protein of keratinocytes. The encoded protein is crosslinked to membrane proteins by transglutaminase, forming an insoluble layer under the plasma membrane. This protein is proline-rich and contains several tandem amino acid repeats.