SDS-PAGE patterns of protein extracted from shrimps treated with STPP and amino acids in combination with NaCl at 3.0 g/100 ml; H: standard marker; Lane 1: control; Lane 2: NaCl (alone); Lane 3: glycine 2.0 g/100 ml; Lane 4: proline 1.0 g/100 ml; Lane 5: lysine 1.0 g/100 ml; Lane 6: arginine 1.0 g/100 ml; Lane 7: STPP 4.0 g/100 ml MHC: myosin heavy chain; AC: actin.