. "\"The linkage of the chromophore phytochromobilin to phycocyanin or allophycocyanin via S-phytochromobilin-L-cysteine.\" [RESID:AA0133]" . . "protein-phytochromobilin linkage via S-phytochromobilin-L-cysteine" . "RESID:AA0133" . . .