Table 1.

Light chains of Chlamydomonas outer arm dynein

Light chaina	Mass (Da)	Predicted pI	Mutant	Interactions within outer arm dynein	Properties	Outer arm specific?
LC1	22,150	5.54	−−−	γ HC, p45b	Leucine-rich repeat protein; motor domain-associated	Yes
LC2	15,825	6.01	oda12-1	LC6, IC1, IC2	Tctex2; required for outer arm function; oda12-1 also is null for LC10; absent in oda6-r88	Yes
			oda12-2
LC3	17,365	7.76	−−−	β HC, γ HC, LC7b	Thioredoxin	Yes
LC4	17,788	4.22	−−−	γ HC	Ca2+ binding	Yes
LC5	14,179	8.34	−−−	α HC	Thioredoxin	Yes
LC6	13,856	6.80	oda13	LC2, IC2	LC8 homologue; not required for arm assembly; absent in oda6-r88	Yes
LC7a	11,928	7.85	oda15	LC7b, IC1 and/or IC2	Roadblock homologue; present in outer arms and inner arm I1	No
LC7b	11,147	5.56	−−−	LC3, LC7a, DC2	Roadblock homologue; present in outer arms and inner arm I1	No
LC8	10,321	7.51	fla14	IC1, IC2	Highly conserved, not dynein-specific	No
LC9	12,981	4.37	−−−	IC1, IC2	Tctex1; not required for arm assembly; absent in oda6-r88	Yes
LC10	12,086	5.28	oda12-1	nk	LC8 homologue; oda12-1 also is null for LC2; reduced in oda6-r88	Yes

^a The light chain nomenclature used here is specific for the Chlamydomonas outer dynein arm.

^b The LC1-interacting protein p45 (Benashski et al., 1999) has now been identified as tubulin (R. S. Patel-King and S. M. King, unpublished data).