the inactivation of the ca2 ( + ) -atpase at 1.5-2.0 kbar pressure in a ca2 ( + ) -free medium was accompanied by changes in the amide ii region of the spectrum ( 1550 cm-1 ) , that are consistent with increased hydrogen-deuterium ( h-2h ) exchange , and by the enhancement of a band at 1630 cm-1 in the amide i region , that is attributed to an increase in beta sheet .
C0020275
hydrogen
C0011744
deuterium