northern blot experiments using genomic dna hybridization probes indicated that phycobiliprotein mrnas were absent in the dark , whereas cells exposed to light contained two allophycocyanin mrna transcripts , 1.4 and 1.6 kilobases in length , and one phycocyanin mrna transcript , 3.0 kilobases in length , providing evidence that phycobiliproteins are encoded in photogenes which are only transcriptionally active in the light .
C0031788
phycocyanin
C0070980
phycobiliproteins