Incorporation of ¹⁴C-phenylalanine or ¹⁴C-tyrosine into the Hypodermal Cuticle of the Silkworm. I

Lethal Lemon Larvae

Abstract

Incorporation experiments with ¹⁴C-phenylalanine or ¹⁴C-tyrosine as metabolites into the hypodermal cuticle of normal and mutant (lemon and lethal lemon) larvae were carried out. It was found from the experimental results that in the lethal lemon larvae the radioactivity of alkali-insoluble protein containing as principal component hard cuticle protein, scleroprotein, is conspiculously weaker in both head and body than in normal larvae.