RESULTS
Differential expression of silk proteins in hybrids of Bombyx mori L.
The total proteins from the posterior and the middle silk gland were extracted and resolved on the SDS-PAGE for
identification of fibroin and sericin. The heavy chain fibroin proteins from these varieties were 350 kDa and the light
chain fibroin proteins were 25 kDa on the gel. The sericin proteins were observed at 66 kDa on the gel when compared
against the known protein marker (M). There was no change in the molecular weight of these proteins but the intensity
of bands varied among different hybrids. Similarly, fibroin heavy chain and light chain were identified on the SDSPAGE and the molecular weights were same but the expression differed in these varieties. A known protein marker was
used as control for comparing the silk proteins and the intensity of the bands was observed as per our estimated protein
concentration (Figure 2).