expression was studied in staged third instar larvae and prepupae collected at two hour intervals. Transcripts can first be detected in early third instar larvae and continue to be present at low levels until 106-108hr. After that, they accumulate to high levels, peaking in early prepupae. Hr39
transcripts drop in abundance in mid prepupae, rise again in 10hr prepupae, and continue to be present through the beginning of pupal development. In staged prepupal salivary glands, Hr39
transcripts are abundant at 0hr, decline in 2hr glands, and then are reintroduced, peaking 6-8hr after puparium formation. Hr39
transcripts are rapidly induced by ecdysone.
transcripts are present at all developmental stages. In embryos, transcripts are most abundant at 6-9 hr. Hr39
transcripts are detected in the stomodeum of stage 13 embryos. In stage 16 embryos, transcripts are most prominent in the central nervous system and in the brain lobes.
3.5kb transcripts are most abundant in 0-3 hour embryos and are probably maternally inherited.
transcripts are not present in early embryos but are detected at all other stages of development. An elevated transcript level is observed during puparium formation. Transcripts are uniformly distributed in early embryos. At later stages, high levels of expression are observed in the ventral cord, brain, and hindgut.
transcripts are maternally expressed. They are uniformly distributed in early embryos.