21. First, the doctors treating the Hashmis must find an embryo whose tissue type is compatible with Zain's. 22. Ng Fan has a rare tissue type . 23. Having a rare tissue type , she realizes she will most likely die before a heart is found. 24. At issue now is whether Geron can expand those rights to include an additional 12 tissue types . 25. Mesenchymal tissue is a tissue type composed of migratory cells that have undergone an epithelial to mesenchymal transition. 26. "Either one of us would have done it, " said Wilmer, whose tissue typing was the better match. 27. Specifically, the study suggests that a strong correlation exists between the tissue type or spatial proximity and genes. 28. Testing of your tissue type costs $ 45, although all people of color are exempt from the fee. 29. While GLUT-1 is found in most mammalian cells, certain tissue types express this transporter more so than others. 30. In the 1968 National Tissue Typing and Reference Laboratory ( NTTRL ) was established at Southmead Hospital in Bristol.