Table 1.

Incorporation of glycine ethyl-ester by DRPLA peptide O₁₂ and brain protein

	dpm × 10−3 incorporated by
	Brain transglutaminase into		Purified liver transglutaminase into
	Brain proteins	DRPLA peptide	Brain proteins	DRPLA peptide
+ Ca2+	1.3	22.2	11.4	548
+ EDTA	0.24	6.3	0.60	5.3

Results are expressed as dpm of amine incorporated into 100 μg of protein or peptide. For incorporation by brain transglutaminase, 1.4 mg of brain extract was incubated with or without 100 μg of DRPLA peptide. For incorporation by purified liver transglutaminase, 100 μg of brain extract or of DRPLA peptide were incubated with 11.5 milliunits of the transglutaminase. Reactions were for 2 h at 37°C.