A transplant for implanting into a host organism, comprising {HEAD ~ cells} encapsulated by {TAIL ~ a matrix}, the matrix comprising: 
A transplant for implanting into a host organism , comprising { HEAD ~ cells } encapsulated by { TAIL ~ a matrix } , the matrix comprising :
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH