The invention includes the use of agitation to enhance the penetration of {HEAD ~ an effective amount} of {TAIL ~ cryoprotectant} 
of
The invention includes the use of agitation to enhance the penetration of { HEAD ~ an effective amount } of { TAIL ~ cryoprotectant }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL