FGSC #3570

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Reporting Genes: (+ + lys-1 + nd al-2 +)

Species: crassa

Allele: no#;4545;15300

Alternate Strain Number: 3S

Mutagen: UV

Depositor: KDM

Linkage Group: IR

Mating Type: a

Species Number: 10

Genetic Background: SL7

ref1: Munkres & Minssen 1976 Mech Ageing & Develop 5:79-98, https://doi.org/10.1016/0047-6374(76)90010-5

Deposit Sheet ↗

Genes

Locus	Cultural Requirements	Link Group	Type
al-2	IR. Right of os-5 (<1%) and T(STL76). Left of arg-6(1%) and al-1 (797, 802, 808, 816, 818). Included in duplications from Tp(T54M94), confirming location left of arg-6(808). (482) Carotenoids absent or abnormal, but steroids produced (398). Blocked in microsomal fraction and defective in phytoene synthetase (445), a particulate enzyme (445 and references cited therein) (Fig. 9). Tracer experiments indicate a lesion between prephytoene pyrophosphate and phytoene (572). Alleles include those resulting in white and pale rose-white, e.g., 15300 and Y254MI65 (1042), and purple, e.g., MN58a (154). For complementation, see references 500 and 1041. Fine-structure mapping (500, 1042) needs reevaluation because of new information on the location of the arg-6 marker (797).	IR	B
nd	IR. Between the centromere (15%) and al-2 (20%) (981).Decreasing clonal growth potential under all nutritional conditions, followed by abrupt irreversible cessation of growth (707, 981). Hypersensitive to sorbose. Conidia die rapidly on slants at 4°C (707). Recessive in heterokaryons. An aged strain can be rejuvenated through heterokaryosis or by crossing to nd+. Extracts nontoxic (981). Used to examine hypotheses of senescence based on faulty protein synthesis (607) and lipid autoxidation with free-radical reactions (702). Stocks maintained in balanced heterokaryons. Initial growth rate of the original strain, 2.5 mm/h; however, nd progeny free of modifiers grow initially at 4.5 mm/h (wild-type rate) (707).	IR	B
lys-1	V. Right of caf-1 (4 to 14%). Left of cyt-9 (5%) and at (1 to 20%) (817; K.S. Hsu, personal communication; PB). (403)Uses lysine, alpha-aminoadipic acid, or epsilon-hydroxynorleucine (alpha-amino-epsilon-hydroxycaproic acid) (399, 400, 684, 1087). Accumulates homocitrate on limiting lysine concentrations (464) (Fig. 16). Fine structure and complementation between alleles (8). Initial allele: 33933.	V	B