it has previously been shown that the regulatory light chains of myosin from limulus , the horseshoe crab , can be phosphorylated either by purified turkey gizzard smooth muscle myosin light chain ( mlc ) kinase or by a crude kinase fraction prepared from limulus muscle [ sellers , j. r. ( 1981 ) j. biol . chem . 256 , 9274-9278 ] .
C0027120
smooth muscle myosin light chain
C0031727
kinase