902019 ECD extracellular domain 751 136128 ED extracellular domain 20 134654 EC extracellular domain 15 152995 EX extracellular domain 2 1992669 DeltaE extracellular domain 1 2809190 DeltaEX extracellular domain 1 3092065 EC-domain extracellular domain 1 151541 ET extracellular domain 1 949425 EXD extracellular domain 1