TABLE 1.

Possible mutant phenotypes

Phenotype	Phenotypea
	Phycobilisome level			GUS activity in HL
	LL	HL	−Sb
Parental strain hliNG	+	−	−	+
Class 1 (defect in hliA-nblA)	+	+	−	+
Class 2 (defect in expression from hliA promoter)	+	+	−	−
Class 3 (defect in PBS degradation)	+	+	+	+

^aVisually monitored phenotype: +, high PBS or GUS level; −, low PBS or GUS level. 

^bFor −S conditions, the cells were exposed to sulfur starvation for 48 h.