2871
Here , we review briefly some of the major ideas and advances of this field , and report on some recent progress from our own experimental work , e . g . that ( i ) non - neural ChEs have pronounced , predominantly enzymatic effects on early embryonic ( limb ) development in chick and mouse , that ( ii ) retinal R28 cells of the rat overexpressing synaptic AChE present a significantly decreased cell proliferation , and that ( iii ) in developing chick retina ACh - synthesizing and ACh - degrading cells originate from the same postmitotic precursor cells , which later form two locally opposing cell populations .
 Chemical: ACh; Chemical: ACh
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: ACh; Chemical: ACh