preferred_name: peptidyl-cysteine modification to S-amindino-L-cysteine
preferred_name_lc: peptidyl-cysteine modification to s-amindino-l-cysteine
label: peptidyl-cysteine modification to S-amindino-L-cysteine
label_lc: peptidyl-cysteine modification to s-amindino-l-cysteine