it had previously been reported ( b. krzysik , j. p. vergnes , and i. r. mcmanus ( 1971 ) arch . biochem . biophys . 146 , 34-45 ) that prior to day 11 of embryonic life chick skeletal muscle actin contained little or no 3-methylhistidine , and that between day 11 and 18 , the degree of actin histidine methylation increased until it leveled off at 1 mol of 3-methylhistidine/mol actin .
C0019602
histidine
C0025780
methylhistidine