>sp|Q3B7S5|SMI21_HUMAN Small integral membrane protein 21 OS=Homo sapiens GN=SMIM21 MDQYVSTAPPRFPIAQLGTFKQDSAGMGRIFKGNLLQKKALTTFENEHHIRFFTLLVLFH VMVLLRNHSRIQGVSEDWKRANSIFRNFLRLKSSRNTAEAE